\(\dfrac{81}{625}=\left(\dfrac{3}{5}\right)^4=\left(-\dfrac{3}{5}\right)^4=\left(\dfrac{9}{25}\right)^2=\left(-\dfrac{9}{25}\right)^2\)

81/625 = 3.3.3.3/5.5.5.5 = 3^4/5^4 = (3/5)^4

Cách viết:

81/625 = 3.3.3.3/5.5.5.5 = 3^4/5^4 = (3/5)^4

chúc bạn vui vẻ

\(\frac{81}{625}=\frac{9^2}{25^2}=\left(\frac{9}{25}\right)^2\)

\(\frac{81}{625}=\frac{3^4}{5^4}=\left(\frac{3}{5}\right)^4\)

`81/625 = (9^2)/(25^2) = (9/25)^2`

`81/625 = (3^4)/(5^4) = (3/5)^4`

\(\dfrac{81}{625}=\left(\dfrac{9}{25}\right)^2\)

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Số hữu tỉ \(\frac{8}{625}\) được viết dưới dạng lũy thừa là :

\(\frac{8}{625}=\frac{2^3}{5^4}\)

\(\frac{8}{625}=\frac{2^3}{25^2}\)

\(\frac{8}{625}=\frac{2^3}{25^2}\)

\(\frac{8}{625}=\frac{2^3}{5^4}\)

\(\frac{8^{14}}{4^{12}}=\frac{\left(2^3\right)^{14}}{\left(2^2\right)^{12}}=\frac{2^{42}}{2^{24}}=2^{42-24}=2^{18}\)

\(\frac{81}{625}=\frac{3.3.3.3}{5.5.5.5}=\frac{3^4}{5^4}=\left(\frac{3}{5}\right)^4\)

\(\frac{81}{625}=\left(\frac{9}{25}\right)^2\)

\(\frac{81}{625}=\left(\frac{3}{5}\right)^4\)

(ko bt là đủ chưa nữa)

\(\dfrac{81}{625}\) = \(\dfrac{3^4}{25^2}\)=\(\dfrac{9^2}{5^4}\)=\(\dfrac{81^1}{625^1}\)