第30页 - 启东中学作业本七年级数学苏科版宿迁专版

D

$a^{11}$

$2a^{12}$

$(a+2b)^9$

$ \begin{aligned} 解：原式&=x^{2×5} \\ &=x^{10} \\ \end{aligned}$

$ \begin{aligned}解：原式&=(x-y)^{2×6} \\ &=(x-y)^{12} \\ \end{aligned}$

$ \begin{aligned}解：原式&=x^6+x^6 \\ &=2x^6 \\ \end{aligned}$

$ \begin{aligned} 解：原式&=2¹⁰×(2³)² \\ &=2¹⁶ \\ \end{aligned}$

$ \begin{aligned} 解：原式&=n^6+(-n)^6 \\ &=n^6+n^6 \\ &=2n^6 \\ \end{aligned}$

$ \begin{aligned}解：原式&=a^6·(-a^6)+a^2·a^{10} \\ &=-a^{12}+a^{12} \\ &=0 \\ \end{aligned}$

A

C

125

3

2