Question

Tính gọn biểu thức :9^5.5^6:45^7

 

Answer 1

\(9^5.5^6:45^7=\frac{9^5.5^6}{\left(9.5\right)^7}\)

\(=\frac{9^5.5^6}{9^7.5^7}\)

\(=\frac{1}{9^2.5}=\frac{1}{405}\)

Answer 2

9⁵ . 5⁶ : 45⁷

= \(\frac{9^5.5^6}{9^7.5^7}\)

= \(\left(9\right)^{-2}.\left(5\right)^{-1}\)

= \(\frac{1}{81}.\frac{1}{5}\)

= \(\frac{1}{405}\)

Answer 3

\(9^5:5^6:45^7\)

\(=\frac{9^5.5^6}{45^7}\)

\(=\frac{9^5.5^6}{9^7.5^7}\)

\(=\frac{1}{9^2.5}\)

\(=\frac{1}{405}\)

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