问题 解答题
计算:
(1)(-ab)6÷(-ab)3
(2)x10÷x8•x2
(3)(
2
3
x2n+3-2xn+3)÷(-3xn+1)

(4)(4x2+2x)÷2x-2x(1-x).
答案

(1)(-ab)6÷(-ab)3

=(-ab)3

=-a3b3

(2)x10÷x8•x2=x4

(3)(

2
3
x2n+3-2xn+3)÷(-3xn+1)=-
2
9
xn+2+
2
3
x2

(4)(4x2+2x)÷2x-2x(1-x)

=2x+1-2x+2x2

=2x2+1.

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