Question

para que valor de x se tem 4^x -2=0?

Answer 1

$4^x-2=0\\\\4^x=2\\\\\left(2^2\right)^x=2\\\\2^{2\;.\;x}=2^1\\\\2^{2x}=2^1\\\\2x=1\\\\x=\frac{1}{2}$

Answer 2

$\boxed{\boxed{Ola\´\ Maria\ Thayse}}$

$4^x-2-=0\\ \\ \\ 4^x=2\\ \\ \\ (2^2)^x=2^1\\ \\ \\ 2^{(2*x)} = 2^1\\ \\ \\ 2^{2x}=2^1\\ \\ \\ Excluindo\ as\ bases :\\ \\ \\ 2x=1\\ \\ \\ \boxed{{x=\dfrac{1}{2} }}$

Espero ter ajudado!