Question

Quando x = 6^-1 e y = 6^-2 quanto vale x + y? * 3 pontos a) 7/6 b) -7/6 c) 7/36 d) -7/36 e) 1/6

Answer 1

$x=6^{-1}, \ y=6^{-2}\\x=\frac{1}{6}, \ y=\frac{1}{36}\\\Rightarrow x+y=\frac{1}{6}+\frac{1}{36}=\frac{36+6}{216}\\\Rightarrow x+y=\frac{7}{36}$