April 2020 1 120 Report

A solução do sistema \left \{ {{3^X^+^1=1} \atop {(\frac{1}{9})^x+2^y=25}} \right. é tal que y-x vale?

a)1

b)2

c)3

d)4

e)5

1) Como resolvo isto?

2) Quanto vale o x e o y?

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