Question

resposta de (7/10)-¹ - (10/7)²

Answer 1

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$( \frac{7}{10} )^{-1}-( \frac{10}{7})^2= \\ \\ \frac{10}{7} - \frac{100}{49} = \\ \\ \frac{70-100}{49}=- \frac{30}{49}$