【答案】
分析:根據(jù)有理數(shù)的負(fù)整數(shù)指數(shù)次冪等于正整數(shù)指數(shù)次冪的倒數(shù),立方根的定義,冪的乘方,底數(shù)不變指數(shù)相乘對(duì)各選項(xiàng)分析判斷后利用排除法求解.
解答:解:A、2
-1=

,故本選項(xiàng)錯(cuò)誤;
B、

=-2,故本選項(xiàng)錯(cuò)誤;
C、

=

,故本選項(xiàng)錯(cuò)誤;
D、(a
2)
5=a
2×5=a
10,故本選項(xiàng)正確.
故選D.
點(diǎn)評(píng):本題考查了立方根的定義,算術(shù)平方根的定義,負(fù)整數(shù)指數(shù)次冪等于正整數(shù)指數(shù)次冪的倒數(shù)的性質(zhì),冪的乘方的性質(zhì),熟記概念是解題的關(guān)鍵.