问题
解答题
计算下列各式,并把结果化为正整数指数幂的形式.
(1)a2b3(2a-1b3);
(2)(a-2)-3(bc-1)3;
(3)2(2ab2c-3)2÷(ab)-2.
答案
(1)a2b3(2a-1b3)=2a2-1b3+3=2ab6;
(2)(a-2)-3(bc-1)3,
=a6b3c-3,
=
;a6b3 c3
(3)2(2ab2c-3)2÷(ab)-2,
=2(4a2b4c-6)÷(a-2b-2),
=8a4b4c-4,
=
.8a4b4 c4