Question

como resolve a letra G da imagem????????

Answer 1

$\frac{5}{x}+\frac{x}{5}=\frac{26}{5}\\\\\frac{5}{x}=\frac{26}{5}-\frac{x}{5}\\\\\frac{5}{x}=\frac{26-x}{5}\\\\5\cdot5=x(26-x)\\\\25=26x-x^2\\\\x^2-26x+25=0\\\\(x-1)\cdot(x-25)=0\\\\\\x'-1=0\qquad\longrightarrow\qquad x'=1\\\\x''-25=0\qquad\longrightarrow\qquad x''=25\\\\\\\\S=\{1,\ 25\}$