Tính:

a, \(\left(2^2\right)^{\left(2^2\right)}\)

b, \(\dfrac{\left(\dfrac{-5}{7}\right)^{n+1} }{\left(\dfrac{-5}{7}\right)^n}\left(n\ge1\right)\)

c, \(\dfrac{8^{14}}{4^{12}}\)

Cách viết:

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

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