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歡迎您訪問數(shù)學(xué)考題練習(xí):下列計(jì)算中,正確的是!

數(shù)學(xué)考題練習(xí):下列計(jì)算中,正確的是

更新時(shí)間:2024-01-12 16:27:41作者:貝語網(wǎng)校

下列計(jì)算中,正確的是

A.2-2=-4

B.(ab)5=ab5

C.(a34=a7

D.

試題答案

D

試題解析

根據(jù)負(fù)整數(shù)指數(shù)冪、算術(shù)平方根以及冪的乘方與積的乘方法則依此計(jì)算,從而得出答案.

解答:A、2-2==,故錯(cuò)誤;

B、(ab)5=a5b5,故錯(cuò)誤;

C、(a34=a12,故錯(cuò)誤;

D、=8,故正確;

故選D.

點(diǎn)評:本題考查了負(fù)整數(shù)指數(shù)冪、算術(shù)平方根以及積的乘方與冪的乘方法則,解題時(shí)牢記法則是個(gè)關(guān)鍵,此題比較簡單,易于掌握.

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