Question

Cine ma poate ajuta ??

Answer 1

Răspuns:

c

Explicație pas cu pas:

$\left \{{{2^{x}=3y} \atop {3^{x}=2y}} \right.\\Le Impartim\\\frac{2^{x}}{3^{x} }=\frac{3y}{2y}, (\frac{2}{3})^{x} =\frac{3}{2}, (\frac{2}{3})^{x} =(\frac{2}{3})^{-1} , x=-1\\atunci 2^{-1}=3y, y=\frac{1}{2}:3=\frac{1}{2}*\frac{1}{3} =\frac{1}{6}\\atunci x^{2} +y=(-1)^{2}+\frac{1}{6}=1+\frac{1}{6}=1\frac{1}{6}=\frac{7}{6}$