第38页 - 经纶学典学霸七年级数学上下册【江苏国标】

A

C

A

0

$-x^{11}$

6

12

4

27

30

6

3

16

9

20

$ \begin{aligned}解：原式&=3¹⁰·(3²)¹⁰ \\ &=3¹⁰·3²⁰ \\ &=3³⁰ \\ \end{aligned}$

$ \begin{aligned}解：原式&=(a-b)³(a-b)⁶ \\ &=(a-b)⁹ \\ \end{aligned}$

$ \begin{aligned} 解：原式&=x⁶·(-x)³ \\ &=-x⁹. \\ \end{aligned}$

$ \begin{aligned}解：原式&=x^{4n}·x^{2n}-x^{6n} \\ &=0. \\ \end{aligned}$

$ \begin{aligned} 解：原式&=-x³·x¹⁰·x-x⁸·x⁶ \\ &=-2x¹⁴. \\ \end{aligned}$

D

B

A

2

$ \begin{aligned} 解：原式&=[(a-b)³]⁴ \\ &=(a-b)¹² \\ \end{aligned}$