题目内容
计算:
(1)(-ab)6÷(-ab)3;
(2)x10÷x8•x2.
(3)(
x2n+3-2xn+3)÷(-3xn+1);
(4)(4x2+2x)÷2x-2x(1-x).
(1)(-ab)6÷(-ab)3;
(2)x10÷x8•x2.
(3)(
| 2 |
| 3 |
(4)(4x2+2x)÷2x-2x(1-x).
(1)(-ab)6÷(-ab)3
=(-ab)3
=-a3b3;
(2)x10÷x8•x2=x4;
(3)(
x2n+3-2xn+3)÷(-3xn+1)=-
xn+2+
x2;
(4)(4x2+2x)÷2x-2x(1-x)
=2x+1-2x+2x2
=2x2+1.
=(-ab)3
=-a3b3;
(2)x10÷x8•x2=x4;
(3)(
| 2 |
| 3 |
| 2 |
| 9 |
| 2 |
| 3 |
(4)(4x2+2x)÷2x-2x(1-x)
=2x+1-2x+2x2
=2x2+1.
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