Tính \(\left( {{{15}^5}:{5^5}} \right).\left( {{3^5}:{6^5}} \right) = ?\)

Câu hỏi :

Tính \(\left( {{{15}^5}:{5^5}} \right).\left( {{3^5}:{6^5}} \right) = ?\)

A. \(\frac{{243}}{{32}}\)

B. \(\frac{{39}}{{32}}\)

C. \(\frac{{32}}{{405}}\)

D. \(\frac{{503}}{{32}}\)

* Đáp án

A

* Hướng dẫn giải

\(\left( {{{15}^5}:{5^5}} \right).\left( {{3^5}:{6^5}} \right) = {3^5}.{\left( {\frac{1}{2}} \right)^5} = {\left( {\frac{3}{2}} \right)^5} = \frac{{243}}{{32}}\)

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