问题
解答题
计算:
(1)(a3)2-(a2)3;
(2)[(a+2b)4]3•(-a-2b);
(3)(an-2)2•[-(a3)2n+1].
答案
(1)(a2)3-(a2)3
=a6-a6
=0;
(2)[(a+2b)4]3•(-a-2b)
=-(a+2b)12(a+2b)
=-(a+2b)13;
(3)(an-2)2•[-(a3)2n+1]
=a2n-4•(-a6n+3)
=-a8a-1.
计算:
(1)(a3)2-(a2)3;
(2)[(a+2b)4]3•(-a-2b);
(3)(an-2)2•[-(a3)2n+1].
(1)(a2)3-(a2)3
=a6-a6
=0;
(2)[(a+2b)4]3•(-a-2b)
=-(a+2b)12(a+2b)
=-(a+2b)13;
(3)(an-2)2•[-(a3)2n+1]
=a2n-4•(-a6n+3)
=-a8a-1.