Question

Answer 1

a, n=3
b, n=4
c, n=2
d, n=3
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Answer 2

a)\(\dfrac{1}{27}=\left(\dfrac{1}{3}\right)^3\)

mà \(\dfrac{1}{27}=\left(\dfrac{1}{3}\right)^n\Rightarrow n=3\)

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

mà\(\left(\dfrac{3}{5}\right)^n=\dfrac{81}{625}\Rightarrow n=4\)

c)\(36=3^2.2^2\)

mà \(3^n.2^n=36\Rightarrow n=2\)

d)\(\dfrac{8}{27}=\left(\dfrac{2}{3}\right)^3=\dfrac{2^3}{3^3}\)

mà \(\dfrac{2^n}{3^n}=\dfrac{8}{27}\Rightarrow n=3\)