题目内容
计算下列各式,并且把结果化为只含有正整数指数幂的形式.
(1)(a2b-3)-2?(a-2b3)2
(2)(x5y2z-3)-2
(3)a-2b2•(-2a2b-2)-2÷(a-4b2)
(4)(
c2a-1b-3)3?(2a2b-1c-1)3.
(1)(a2b-3)-2?(a-2b3)2
(2)(x5y2z-3)-2
(3)a-2b2•(-2a2b-2)-2÷(a-4b2)
(4)(
3 |
4 |
(1)原式=a-4 b6•a-4 b6
=a-8 b12
=
;
(2)原式=x-10 y-4 z 6
=
;
(3)原式=a-2 b2•
a -4b4•a4b-2
=
a-2 b4
=
;
(4)原式=(
ab-4 c)3
=
.
=a-8 b12
=
b12 |
a8 |
(2)原式=x-10 y-4 z 6
=
z6 |
x10y4 |
(3)原式=a-2 b2•
1 |
4 |
=
1 |
4 |
=
b4 |
4a2 |
(4)原式=(
3 |
2 |
=
27a3c3 |
8b12 |
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