Question

5 elevado 2x +4.5 elevado a x -5=0?

Answer 1

Resposta:

S = {  }

Explicação passo a passo:

$5^2^x+4.5^x^-^5=0\\\\(5^x)^2+4.\frac{5^x}{5}=0\\\\5^x=y\\\\y^2+4.\frac{y}{5} =0\\\\5y^2+4y=0\\\\y(5y+4)=0\\\\y=0\\ou\\5y+4=0\\\\5y=-4 \\\\y=-\frac{4}{5}\\\\5^x=0,~~n\tilde ao~~existe~~x~~real.\\\\5^x=-\frac{4}{5},~~n\tilde ao~~existe~~x~~real.$