Question

12．計(jì)算（a為正數(shù)）：a${\;}^{\frac{1}{3}}$a${\;}^{\frac{3}{4}}$a${\;}^{\frac{7}{12}}$．

Answer 1

分析 根據(jù)分?jǐn)?shù)指數(shù)冪的法則計(jì)算即可．

解答 解：${a}^{\frac{1}{3}}{a}^{\frac{3}{4}}{a}^{\frac{7}{12}}={a}^{\frac{1}{3}+\frac{3}{4}+\frac{7}{12}}={a}^{\frac{5}{3}}$．

點(diǎn)評 此題考查分?jǐn)?shù)指數(shù)冪，關(guān)鍵是根據(jù)分?jǐn)?shù)指數(shù)冪的法則計(jì)算．