初三中考复习时关于二次函数应用的专题复习30题

初三中考复习时关于二次函数应用的专题复习30题 初三中考复习时关于二次函数应用的专题复习30题 1、徒骇河大桥是我市第一座特大型桥梁，大桥桥体造型新颖，气势恢宏，两条拱肋如长虹卧波，极具时代气息(如图?)(大 桥为中承式悬索拱桥，大桥的主拱肋ACB是抛物线的一部分(如图?)，跨径AB为100m，拱高OC为25m，抛物线 顶点C到桥面的距离为17m( (1)请建立适当的坐标系，求该抛物线所对应的函数关系式; (2)七月份汛期来临，河水水位上涨，假设水位比AB所在直线高出1.96m，这时位于水面上的拱肋的跨径是多少, 在不计桥面厚度的情况，一条高出水面4.6m的游船是否能够顺利通过大桥, 2、某商场将每件进价为80元的某种商品原来按每件100元出售，一天可售出100件(后来经过市场调查，发现这种商品单价每降低1元，其销量可增加10件( (1)求商场经营该商品原来一天可获利润多少元, (2)设后来该商品每件降价x元，，商场一天可获利润y元( ?求出y与x之间的函数关系式;. ?商场经营该商品，每件商品应降价多少元时，可获得最大利润,最大利润是多少? 3通过画该函数图像的草图，观察其图像的变化趋势，结合题意写出当x取何值时，商场获利润不少于2160元, 3、某批发市场批发甲、乙两种水果，根据以往经验和市场行情，预计夏季某一段时间内，甲种水果的销售利润(万元)与进货量(吨)近似满足函数关系;乙种水果的销售利润(万元)与进货量(吨)近似满足函数关系(其中为常数)，且进货量为1吨时，销售利润为1.4万元;进货量为2吨时，销售利润为2.6万元( (1)求(万元)与(吨)之间的函数关系式( (2)如果市场准备进甲、乙两种水果共10吨，设乙种水果的进货量为吨，请你写出这两种水果所获得的销售利润之 和(万元)与(吨)之间的函数关系式(并求出这两种水果各进多少吨时获得的销售利润之和最大，最大利润是 多少, 4、北方某水果商店从南方购进一种水果，其进货成本是每吨0.4万元，根据市场调查这种水果在北方市场上的销售量(吨)与每吨的销售价(万元)之间的函数关系如下图所示: (1)求出销售量与每吨销售价之间的函数关系式; (2)如果销售利润为(万元)，请写出与之间的函数关系式; (3)当每吨销售价为多少万元时，销售利润最大,最大利润是多少, 5、某宾馆客房部有60个房间供游客居住，当每个房间的定价为每天200元时，房间可以住满(当每个房间每天的定价每增加10元时，就会有一个房间空闲(对有游客入住的房间，宾馆需对每个房间每天支出20元的各种费用( 设每个房间每天的定价增加元(求: (1)房间每天的入住量(间)关于(元)的函数关系式((2分) (2)该宾馆每天的房间收费(元)关于(元)的函数关系式((3分) (3)该宾馆客房部每天的利润(元)关于(元)的函数关系式;当每个房间的定价为每天多少元时，有最大值,最大值是多少,(5分) 6、某产品每件成本10元,试销阶段每件产品的销售价x(元)与产品的日销售量y(件)之间的关系如下表 15 20 30 „ x(元) 25 20 10 „ y(件) 若日销售量y是销售价x的一次函数. (1)求出日销售量y(件)与销售价x(元)的函数关系式; (2)要使每日的销售利润最大，每件产品的销售价应定为多少元,此时每日销售利润是多少元, 7、右图是某河上一座古拱桥的截面图，拱桥桥洞上沿是抛物线形状，抛物线两端点与水面的距离都 是1m，拱桥的跨度为10m，桥洞与水面的最大距离是5m，桥洞两侧壁上各有一盏距离水面4m的景 观灯(若把拱桥的截面图放在平面直角坐标系中(如下图)(1)求抛物线的解析式.(2)求两盏景观灯之间的水平obstacles, correcting misunderstandings, advocate good cadre style. 2, adhere to the scientific decision-making and democratic decision-making decision-making law. Correctly handle to ensure that government decrees and based on the actual creative work, giving full play to subjective initiative, put an end to implement the conference meeting, to document the implementation of documents etc. Improve the scientific and democratic decision-making mechanism, improve and implement the decision to solicit the views of experts, the public hearing system. Improve the important decision of risk assessment mechanism and legal review mechanism. 3, to promote team unity. Uphold and improve the system of annual party book talk heart to heart, mind and Party members, Party members to exchange each other not less than 2 times. The implementation of sound team democratic life system, consolidate and enhance the party's mass line educational practice will promote the achievement of the topic of democratic life, criticism and self-criticism normalization, a long-term. Adhere to the party on the basis of the principle of unity, enhance internal communication, strengthen internal supervision, self Sleep maintenance team collective image and authority. (three) to ensure the execution is not strong or disguised to resist government decrees issues. Individual Bureau leadership team members lack of learning political theory system, not from the objective reality, not with the party's interests above all the principles to deal with personal problems. In the specific work safety supervision in the execution is not strong, in the implementation of the decision to deploy the discount, make choices, engage in work, the implementation of the agreement, uncomfortable is not performed, open or disguised to resist, the lack of subject consciousness of the party organization, the lack of resist in society all kinds of bad habits and unwholesome tendencies of courage Gas and courage. Such as the liability insurance of safe production work, individual leaders that have someone arrested, and no funding, not in the global chess perspective to the countryside to carry out daily inspection, found none of my business acceptance of the resumption of production in an armchair, with a pen, indifferent. Corrective measures: (LED Leadership: Luo Mingjun, rectification time: before September 25th, insist for a long time) 1, to strengthen the sense of responsibility, work to solve the lack of decent occupation explain away, conduct problems. To establish the overall concept, eliminate departmentalism. Strict assessment and accountability, to solve the spiritual slack, nianqingpazhong, status quo, To establish and perfect the muddle along and other issues. Bureau staff conduct work regulations, standardize the behavior of personnel. 2, strengthen the responsibility system. One is the in-depth study and implement the "Hunan provincial Party and government leading cadres Interim Provisions on the work safety of a pair of > (Hunan Office issued 2013 No. 距离. 8、某电视机生产厂家去年销往农村的某品牌电视机每台的售价(元)与月份之间满足函数关系，去年的月销售量(万台)与月份之间成一次函数关系，其中两个月的销售情况如下表: 月份 1月 5月 销售量 3.9万台 4.3万台 (1)、求(万台)与月份之间成一次函数关系式 (2)、该品牌电视机在去年哪个月销往农村的销售金额最大,最大是多少, 9、如图，一座抛物线型的拱桥，正常水位时桥下水面宽度AB为29m，拱顶离水面4m，桥下水深2m，为保证过往船只顺利航行，桥下水面的宽度不得小于16m,求水深超过多少米时，就会影响过往船只在桥下顺利航行, 10、日照市是中国北方最大的对虾养殖产区，被国家农业部列为对虾养殖重点区域;贝类产品西施舌是日照特产(沿海某养殖场今年养殖无公害化对虾和西施舌，由于受养殖水面的制约，这两个品种的苗种的总投放量只有50吨(根据经验测算，这两个品种的种苗每投放一吨的先期投资、养殖期间的投资以及产值如下表: (单位:千元/吨) 品种 先期投资 养殖期间投资 产值 西施9 3 30 舌 对虾 4 10 20 .养殖场受经济条件的影响，先期投资不超过360千元，养殖期间的投资不超过290千元(设西施舌种苗的投放量为x吨 (1)求x的取值范围; (2)设这两个品种产出后的总产值为y(千元)，试写出y与x之间的函数关系式，并求出当x等于多少时，y有最大值,最大值是多少, 11、一座拱桥的轮廓是抛物线型(如图1所示)，拱高6m，跨度20m，相邻两支柱间的距离均为5m( (1)将抛物线放在所给的直角坐标系中(如图2所示)，求抛物线的解析式; (2)求支柱的长度; (3)拱桥下地平面是双向行车道(正中间是一条宽2m的隔离带)，其中的一条行车道能否并排行驶宽2m、高 3m的三辆汽车(汽车间的间隔忽略不计),请说明你的理由( 12、利达经销店为某工厂代销一种建筑材料(这里的代销是指厂家先免费提供货源，待货物售出后再进行结算，未售出的由厂家负责处理)。当每吨售价为260元时，月销售量为45吨。该经销店为提高经营利润，准备采取降价的方式进行促销。经市场调查发现:当每吨售价每下降10元时，月销售量就会增加7. 5吨。综合考虑各种因素，每售出一吨建筑材料共需支付厂家及其它费用100元。 设每吨材料售价为x(元)，该经销店的月利润为y(元)。 (1)当每吨售价是240元时，计算此时的月销售量; (2)求出y与x的二次函数关系式(不要求写出x的取值范围); 2(3)请把(2)中的二次函数配方成y= a(x- h)+ k的形式，并据此说明，该经销店要 获得最大月利润，售价应定为每吨多少元; (4)小静说:“当月利润最大时，月销售额也最大。”你认为对吗,请说明理由。 13、某商品的进价为每件30元，现在的售价为每件40元，每星期可卖出150件(市场调查反映:如果每件的售价每涨1元(售价每件不能高于45元)，那么每星期少卖10件(设每件涨价x元(x为非负整数)，每星期的销量为y件( (1)求y与x的函数关系式及自变量x的取值范围; (2)如何定价才能使每星期的利润最大且每星期的销量较大,每星期的最大利润是多少, 14、某文具零售店准备从批发市场选购A、B两种文具，批发价A种为12元/件，B种为8元/件。若该店零售A、B两obstacles, correcting misunderstandings, advocate good cadre style. 2, adhere to the scientific decision-making and democratic decision-making decision-making law. Correctly handle to ensure that government decrees and based on the actual creative work, giving full play to subjective initiative, put an end to implement the conference meeting, to document the implementation of documents etc. Improve the scientific and democratic decision-making mechanism, improve and implement the decision to solicit the views of experts, the public hearing system. Improve the important decision of risk assessment mechanism and legal review mechanism. 3, to promote team unity. Uphold and improve the system of annual party book talk heart to heart, mind and Party members, Party members to exchange each other not less than 2 times. The implementation of sound team democratic life system, consolidate and enhance the party's mass line educational practice will promote the achievement of the topic of democratic life, criticism and self-criticism normalization, a long-term. Adhere to the party on the basis of the principle of unity, enhance internal communication, strengthen internal supervision, self Sleep maintenance team collective image and authority. (three) to ensure the execution is not strong or disguised to resist government decrees issues. Individual Bureau leadership team members lack of learning political theory system, not from the objective reality, not with the party's interests above all the principles to deal with personal problems. In the specific work safety supervision in the execution is not strong, in the implementation of the decision to deploy the discount, make choices, engage in work, the implementation of the agreement, uncomfortable is not performed, open or disguised to resist, the lack of subject consciousness of the party organization, the lack of resist in society all kinds of bad habits and unwholesome tendencies of courage Gas and courage. Such as the liability insurance of safe production work, individual leaders that have someone arrested, and no funding, not in the global chess perspective to the countryside to carry out daily inspection, found none of my business acceptance of the resumption of production in an armchair, with a pen, indifferent. Corrective measures: (LED Leadership: Luo Mingjun, rectification time: before September 25th, insist for a long time) 1, to strengthen the sense of responsibility, work to solve the lack of decent occupation explain away, conduct problems. To establish the overall concept, eliminate departmentalism. Strict assessment and accountability, to solve the spiritual slack, nianqingpazhong, status quo, To establish and perfect the muddle along and other issues. Bureau staff conduct work regulations, standardize the behavior of personnel. 2, strengthen the responsibility system. One is the in-depth study and implement the "Hunan provincial Party and government leading cadres Interim Provisions on the work safety of a pair of > (Hunan Office issued 2013 No. 种文具的日销售量y(件)与零售价x(元/件)均成一次函数关系。 (1)求y与x的函数关系式; (2)该店计划这次选购A、B两种文具的数量共100件，所花资金不超过1000元，并希望全部售完获利不低于296元，若按A种文具日销售量4件和B种文具每件可获利2元计算，则该店这次有哪几种进货, (3)若A种文具的零售价比B种文具的零售价高2元/件，求两种文具每天的销售利润W(元)与A种文具零售价x(元/件)之间的函数关系式，并说明A、B两种文具零售价分别为多少时，每天销售的利润最大, 15、某商店经销一种销售成本为每千克40元的水产品，根据是产分析，若按每千克50元销售，一个月能售出500千克;销售单价每涨价1元，月销售量就减少10千克，针对这种水产品的销售情况，请解答以下问题:(1)当销售单价定位每千克55元时，计算月销量和月销售利润;(2)设销售单价为每千克x元，月销售利润为y元，求y与x之间的函数关系式(不必写出x的取值范围)(3)商店想在月销售成本不超过10000元的情况下，使得月销售利润达到8000元，销售单价应定为多少, 16、有一个抛物线型的桥洞，桥洞离水面的最大高度BM为3米，跨度OA为6米，以OA所在直线为x轴，O为原点建立直角坐标系。(1)求抛物线的函数关系式。(2)若有一艘小船平放着一些长3米，宽1米且厚度均匀的矩形木板，要使该小船能通过桥洞，问这些木板最高可放多少米(设船身底板与水面在同一平面), 17、为了落实国务院副总理李克强同志到恩施考察时的指示精神,最近，州委州政府又出台了一系列“三农”优惠政策,使农民收入大幅度增加.某农户生产经销一种农副产品,已知这种产品的成本价为20元/千克.市场调查发现,该产品每天的销售量,(千克)与销售价,(元/千克)有如下关系:,=,2,，80.设这种产品每天的销售利润为,(元). (1)求,与,之间的函数关系式. (2)当销售价定为多少元时,每天的销售利润最大?最大利润是多少? (3)如果物价部门这种产品的销售价不得高于28元/千克,该农户想要每天获得150元的销售利润,销售价应定为多少元? 2、小敏在某次投篮中，球的运动路线是抛物线y=-x+3.5的一部分若命中篮圈中心，则他与篮底的距离L是多少, 18 19、如图，隧道的截面由抛物线和矩形构成，矩形的长为8m，宽AB为2m，以BC所在的直线为x轴，线段BC的中垂线为y轴，建立平面直角坐标系，y轴是抛物线的对称轴，顶点E到坐标原点的距离为。 (1)求抛物线的解析式; (2)一辆货运卡车高，宽2.4m，它能通过该隧道吗, (3)如果该隧道内设双行道，为了安全起见，在隧道正中间设有0.4m的隔离带，则该辆货运卡车还能通过隧道吗 20、足球场上守门员在处开出一高球，球从离地面1米的处飞出(在y轴上)，运动员乙在距点6米的处发现球在自己头的正上方达到最高点，距地面约4米高，球落地后又一次弹起(据实验，足球在草坪上弹起后的抛物线与原来的抛物线形状相同，最大高度减少到原来最大高度的一半。 (1)求足球开始飞出到第一次落地时，该抛物线的表达式。(2)足球第一次落地点距守门员多少米,(取) (3)运动员乙要抢到第二个落点，他应再向前跑多少米,(取) 21、某校八学生小丽、小强和小红到某超市参加了社会实践活动，在活动中他们参与了某种水果的销售工作，已知该水果的进价为8元/千克，下面是他们在活动结束后的对话。 小丽:如果以10元/千克的价格销售，那么每天可售出300千克。 小强:如果以13元/千克的价格销售，那么每天可获取利润750元。 小红:通过调查验证，我发现每天的销售量y(千克)与销售单价x(元)之间存在一次函数关系。 (1)求y(千克)与x(元)(x,0)的函数关系式; (2)设该超市销售这种水果每天获取的利润为W元，那么当销售单价为何值时，每天可获得的利润最大,最大利润是多少元,【利润,销售量×(销售单价,进价)】 22、某超市销售某种品牌的纯牛奶，已知进价为每箱40元，生产厂家要求每箱的售价在40元~70元之间(市场调查发现:若每箱50元销售，平均每天可销售90箱，价格每降低1元，平均每天多销售3箱;价格每升高1元，平均每天少销售3箱。 (1)写出平均每天的销售量y(箱)与每箱售价x(元)之间的函数关系式(注明自变量x的取值范围); (2)求出超市平均每天销售这种牛奶的利润W(元)与每箱牛奶的售价x(元)之间的二次函数关系式(每箱的利润=售价,进价); obstacles, correcting misunderstandings, advocate good cadre style. 2, adhere to the scientific decision-making and democratic decision-making decision-making law. Correctly handle to ensure that government decrees and based on the actual creative work, giving full play to subjective initiative, put an end to implement the conference meeting, to document the implementation of documents etc. Improve the scientific and democratic decision-making mechanism, improve and implement the decision to solicit the views of experts, the public hearing system. Improve the important decision of risk assessment mechanism and legal review mechanism. 3, to promote team unity. Uphold and improve the system of annual party book talk heart to heart, mind and Party members, Party members to exchange each other not less than 2 times. The implementation of sound team democratic life system, consolidate and enhance the party's mass line educational practice will promote the achievement of the topic of democratic life, criticism and self-criticism normalization, a long-term. Adhere to the party on the basis of the principle of unity, enhance internal communication, strengthen internal supervision, self Sleep maintenance team collective image and authority. (three) to ensure the execution is not strong or disguised to resist government decrees issues. Individual Bureau leadership team members lack of learning political theory system, not from the objective reality, not with the party's interests above all the principles to deal with personal problems. In the specific work safety supervision in the execution is not strong, in the implementation of the decision to deploy the discount, make choices, engage in work, the implementation of the agreement, uncomfortable is not performed, open or disguised to resist, the lack of subject consciousness of the party organization, the lack of resist in society all kinds of bad habits and unwholesome tendencies of courage Gas and courage. Such as the liability insurance of safe production work, individual leaders that have someone arrested, and no funding, not in the global chess perspective to the countryside to carry out daily inspection, found none of my business acceptance of the resumption of production in an armchair, with a pen, indifferent. Corrective measures: (LED Leadership: Luo Mingjun, rectification time: before September 25th, insist for a long time) 1, to strengthen the sense of responsibility, work to solve the lack of decent occupation explain away, conduct problems. To establish the overall concept, eliminate departmentalism. Strict assessment and accountability, to solve the spiritual slack, nianqingpazhong, status quo, To establish and perfect the muddle along and other issues. Bureau staff conduct work regulations, standardize the behavior of personnel. 2, strengthen the responsibility system. One is the in-depth study and implement the "Hunan provincial Party and government leading cadres Interim Provisions on the work safety of a pair of > (Hunan Office issued 2013 No. (3)请把(2)中所求出的二次函数配方成的形式，并指出当x=40、70时，W的值; (4)在坐标系中画出(2)中二次函数的图象，请你观察图象说明:当牛奶售价为多少时，平均每天的利润最大,最大利润为多少, 23、在青岛市开展的创城活动中，某居民小区要在一块一边靠墙(墙长15米)的空地上修建一个矩形花园ABCD，花园的一边靠墙，另三边用总长为40米的栅栏围成。若设花园的BC边长为x米，花园的面积为y米2。 (1)求y与x的函数关系式，并求出自变量x的取值范围。 (2)满足条件的花园面积能达到200米2吗,若能，求出此时x的值;若不能，说明理由。 (3)根据(1)中求得的函数关系式，描述图像的变化趋势;并结合题意判断当x取何值时，花园的面积最大,最大面积是多少, 24、市“健益”超市购进一批元,千克的绿色食品，如果以元,千克销售，那么每天可售出千克(由销售经验知，每天销售量y(千克)与销售单价(元)()存在如下图所示的一次函数关系( (1)试求出y与的函数关系式; (2)设“健益”超市销售该绿色食品每天获得利润p元，当销售单价为何值时，每天可获得最大利润,最大是多少, (3)根据市场调查，该绿色食品每天可获利润不超过元，现该超市经理要求每天利润不得低于元，请你帮助该超市确定绿色食品销售单价的范围(直接写出)( 25、随着绿城南宁近几年城市建设的快速发展，对花木的需求量逐年提高。某园林专业户计划投资种植花卉及树木，根据市场调查与预测，种植树木的利润与投资量成正比例关系，如图12-?所示;种植花卉的利润与投资量成二次函数关系，如图12-?所示(注:利润与投资量的单位:万元) (1)分别求出利润与关于投资量的函数关系式; (2)如果这位专业户以8万元资金投入种植花卉和树木，他至少获得多少利润,他能获取的最大利润是多少, 26、 如图，某隧道横截面的上下轮廓线分别由抛物线对称的一部分和矩形的一部分构成，最大高度为6米，底部宽度为 12米.现以O点为原点，OM所在直线为x轴建立直角坐标系. (1)直接写出点M及抛物线顶点P的坐标; (2)求出这条抛物线的函数解析式; (3)若要搭建一个矩形“支撑架”AD- DC- CB，使C、D点在抛物线上，A、B点在地面OM上，则这个“支撑架”总长的最大值是多少, 27、如图，把一张长10cm，宽8cm的矩形硬纸板的四周各剪去一个同样大小的正方形，再折合成一个无盖的长方体盒子(纸板的厚度忽略不计)( (1)要使长方体盒子的底面积为48cm2，那么剪去的正方形的边长为多少, (2)你感到折合而成的长方体盒子的侧面积会不会有更大的情况,如果有，请你求出最大值和此时剪去的正方形的边长;如果没有，请你说明理由; 28、某公司专销产品A，第一批产品A上市40天内全部售完。该公司对第一批产品A上市后的市场销售情况进行了跟踪调查，调查结果如图所示，其中图10中的折线表示的是市场日销售量与上市时间的关系;图11中的折线表示的是每件产品A的销售利润与上市时间的关系。 (1)试写出第一批产品A的市场日销售量y与上市时间t的关系式; (2)第一批产品A上市后，哪一天这家公司市场日销售利润最大,最大利润是多少万元, 30、我市高新技术开发区的某公司，用480万元购得某种产品的生产技术后，并进一步投入资金1520万元购买生产设备，进行该产品的生产加工，已知生产这种产品每件还需成本费40元.经过市场调研发现:该产品的销售单价，需定在100元到300元之间较为合理.当销售单价定为100元时，年销售量为20万件;当销售单价超过100元，但不超过200元时，每件新产品的销售价格每增加10元，年销售量将减少0.8万件;当销售单价超过200元，但不超过300元时，每件产品的销售价格每增加10元，年销售量将减少1万件.设销售单价为x(元)，年销售量为y(万件)，年获利为w(万元).(年获利=年销售额—生产成本—投资成本) (1)直接写出y与x之间的函数关系式; obstacles, correcting misunderstandings, advocate good cadre style. 2, adhere to the scientific decision-making and democratic decision-making decision-making law. Correctly handle to ensure that government decrees and based on the actual creative work, giving full play to subjective initiative, put an end to implement the conference meeting, to document the implementation of documents etc. Improve the scientific and democratic decision-making mechanism, improve and implement the decision to solicit the views of experts, the public hearing system. Improve the important decision of risk assessment mechanism and legal review mechanism. 3, to promote team unity. Uphold and improve the system of annual party book talk heart to heart, mind and Party members, Party members to exchange each other not less than 2 times. The implementation of sound team democratic life system, consolidate and enhance the party's mass line educational practice will promote the achievement of the topic of democratic life, criticism and self-criticism normalization, a long-term. Adhere to the party on the basis of the principle of unity, enhance internal communication, strengthen internal supervision, self Sleep maintenance team collective image and authority. (three) to ensure the execution is not strong or disguised to resist government decrees issues. Individual Bureau leadership team members lack of learning political theory system, not from the objective reality, not with the party's interests above all the principles to deal with personal problems. In the specific work safety supervision in the execution is not strong, in the implementation of the decision to deploy the discount, make choices, engage in work, the implementation of the agreement, uncomfortable is not performed, open or disguised to resist, the lack of subject consciousness of the party organization, the lack of resist in society all kinds of bad habits and unwholesome tendencies of courage Gas and courage. Such as the liability insurance of safe production work, individual leaders that have someone arrested, and no funding, not in the global chess perspective to the countryside to carry out daily inspection, found none of my business acceptance of the resumption of production in an armchair, with a pen, indifferent. Corrective measures: (LED Leadership: Luo Mingjun, rectification time: before September 25th, insist for a long time) 1, to strengthen the sense of responsibility, work to solve the lack of decent occupation explain away, conduct problems. To establish the overall concept, eliminate departmentalism. Strict assessment and accountability, to solve the spiritual slack, nianqingpazhong, status quo, To establish and perfect the muddle along and other issues. Bureau staff conduct work regulations, standardize the behavior of personnel. 2, strengthen the responsibility system. One is the in-depth study and implement the "Hunan provincial Party and government leading cadres Interim Provisions on the work safety of a pair of > (Hunan Office issued 2013 No. (2)求第一年的年获利w与x间的函数关系式，并说明投资的第一年，该公司是盈利还是亏损,若盈利，最大利 润是多少,若亏损，最少亏损是多少, (3)若该公司希望到第二年底，除去第一年的最大盈利(或最小亏损)后，两年的总盈利不低于1842元，请你确定 此时销售单价的范围.在此情况下，要使产品销售量最大，销售单价应定为多少元, obstacles, correcting misunderstandings, advocate good cadre style. 2, adhere to the scientific decision-making and democratic decision-making decision-making law. Correctly handle to ensure that government decrees and based on the actual creative work, giving full play to subjective initiative, put an end to implement the conference meeting, to document the implementation of documents etc. Improve the scientific and democratic decision-making mechanism, improve and implement the decision to solicit the views of experts, the public hearing system. Improve the important decision of risk assessment mechanism and legal review mechanism. 3, to promote team unity. Uphold and improve the system of annual party book talk heart to heart, mind and Party members, Party members to exchange each other not less than 2 times. The implementation of sound team democratic life system, consolidate and enhance the party's mass line educational practice will promote the achievement of the topic of democratic life, criticism and self-criticism normalization, a long-term. Adhere to the party on the basis of the principle of unity, enhance internal communication, strengthen internal supervision, self Sleep maintenance team collective image and authority. (three) to ensure the execution is not strong or disguised to resist government decrees issues. Individual Bureau leadership team members lack of learning political theory system, not from the objective reality, not with the party's interests above all the principles to deal with personal problems. In the specific work safety supervision in the execution is not strong, in the implementation of the decision to deploy the discount, make choices, engage in work, the implementation of the agreement, uncomfortable is not performed, open or disguised to resist, the lack of subject consciousness of the party organization, the lack of resist in society all kinds of bad habits and unwholesome tendencies of courage Gas and courage. Such as the liability insurance of safe production work, individual leaders that have someone arrested, and no funding, not in the global chess perspective to the countryside to carry out daily inspection, found none of my business acceptance of the resumption of production in an armchair, with a pen, indifferent. Corrective measures: (LED Leadership: Luo Mingjun, rectification time: before September 25th, insist for a long time) 1, to strengthen the sense of responsibility, work to solve the lack of decent occupation explain away, conduct problems. To establish the overall concept, eliminate departmentalism. Strict assessment and accountability, to solve the spiritual slack, nianqingpazhong, status quo, To establish and perfect the muddle along and other issues. Bureau staff conduct work regulations, standardize the behavior of personnel. 2, strengthen the responsibility system. One is the in-depth study and implement the "Hunan provincial Party and government leading cadres Interim Provisions on the work safety of a pair of > (Hunan Office issued 2013 No.