Question

(1-3supra 4)^-2
VA ROGGGGGGGGGGGGGG rezolvati

Answer 1

Ai formula $a^{-k}= \frac{1}{ a^{k} },si, (\frac{a}{b}) ^{-k}= ( \frac{b}{a}) ^{k}$, deci $(1- \frac{3}{4}) ^{-2}= (\frac{1}{4}) ^{-2}= (\frac{4}{1})^2=16$