问题
填空题
填空: (1)(-2)3=______;(-
(2)(-1)2n=______;(-1)2n+1=______;(-10)2n=______;(-10)2n+1=______. (3)-12=______;-
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答案
(1)(-2)3=(-2)×(-2)×(-2)=-8;
(-
)3=(-1 2
)×(-1 2
)×(-1 2
)=-1 2
;1 8
(-2
)3=(-1 3
)×(-7 3
)×(-7 3
)=-127 3
;19 27
03=0;
(2)(-1)2n=1;(-1)2n+1=-1;(-10)2n=102n;(-10)2n+1=-102n+1.
(3)-12=-1;-
=-1 43
;-1 64
=-32 4
;-(-9 4
)3=-(-2 3
)=8 27
.8 27