幂的乘方与积的乘方练习
幂的乘方与积的乘方
一、填空题:(每题4分,共32分)
12223n=________, =_________. 1. ()aa,(),abc3
52nnnn2337,,,,2. =_________,. ()()pqpq,,,()4,ab,,,,
3()2143.. ()aaa,,
232224. =__________. (3)()aaa,,
221nn,5. =__________. ()()xyxy,
11001002200420036. =_________,=_____. {[(1)]},,,()(3),,3
nnn23n7.若,则=_______,=________. xy,,2,3()xy()xy
43n12882,,8.若,则n=__________. 二、选择题:(每题4分,共32分)
329.若a为有理数,则的值为( ) ()a
A.有理数 B.正数 C.零或负数 D.正数或零
3310.若,则a与b的关系是( ) ()0ab,
A.异号 B.同号 C.都不为零 D.关系不确定
8233211.计算的结果是( ) ()()[()],,,,,ppp
20201818 A.- B. C.- D. pppp
xy44,12.= ( )
xy2()xy,xyxy,421616 A. B. C. D. 13.下列命题中,正确的有( )
mnmn,,,33mm?,?m为正奇数时,一定有等式成立, ()xx,(4)4,,,
mm?等式,无论m为何值时都不成立 (2)2,,
236326236?三个等式:都不成立( ) (),(),[()],,,,,,,aaaaaa
A.1个 B.2个 C.3个 D.4个
12033214.已知?x?=1,?y?=,则的值等于( ) ()xxy,2
353535 A.- 或- B. 或 C. D.- 444444
55443315. 已知,则a、b、c的大小关系是( ) abc,,,2,3,4
A.b>c>a B.a>b>c C.c>a>b D.a