义务献血倡议书

数 ， 。 （2） 2.(1) = 2k (1－k) 0 k 0 且 k 1, 即k 0且k 1时， 线性表示且表法唯一 ……………………2分 （2）当 k=1时， 若b－a=0, 则 或 ……………………4分 当k=0时 若c－b－a=0时， 或 ……………………6分 即当k=1 且b=a时，表法不唯一， (c－a) 或 (c－a) 当k=0 且c=a+b时，表法不唯一， b 或 a (3). 当k=1且b－a 0或 k=0且c－b－a 0时， 不能由 线性表示 ……………………8分 3.设销售一个零件获利为L，则 L＝ ……………………2分 EL= －P( <10) + 20P (10 EMBED Equation.3 EMBED Equation.3 12) －5P( >12) = － (10－ )+20[ ]－5 =25 －21 －5 ……………………4分 ＝－25 ＋21 ＝0 25 ＝21 ……………………6分 ＝ ln25－ln21－22＋2μ＝0 μ＝11－ ＝11－ ＝11－ ＝11－ ＝10.9 ……………………8分 五1. (1) 绝对值级数 的部分和 正项级数 的部分和 (2) 用反证法，假定级数 收敛，其部分和为 设级数 的部分和为 ， 则级数 的部分和 与 收敛 , 故级数 发散 。 2．设 ……………………1分 即 （1） 左乘A ……………………3分 又 故 （2） 代入（1）得： 线性无关， ……………………5分 代入（2）得： EMBED Equation.3 线性无关 ……………………7分 � EMBED Equation.3 ��� PAGE 9 _1182274927.unknown _1182283861.unknown _1182323446.unknown _1182364530.unknown _1182433330.unknown _1182435761.unknown _1182436898.unknown _1182436922.unknown _1182436947.unknown _1182437061.unknown _1182436940.unknown _1182436904.unknown _1182436330.unknown _1182436338.unknown _1182435841.unknown _1182436296.unknown _1182434986.unknown _1182435315.unknown _1182435484.unknown _1182435682.unknown _1182435384.unknown _1182435417.unknown _1182435427.unknown _1182435374.unknown _1182435079.unknown _1182435170.unknown _1182435217.unknown _1182435237.unknown _1182435204.unknown _1182435116.unknown _1182435002.unknown _1182434176.unknown _1182434656.unknown _1182434727.unknown _1182434270.unknown _1182433687.unknown _1182433984.unknown _1182433346.unknown 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