Question

4 la puterea x-1=1/8

Answer 1

Răspuns:

$4^{x-1}=\frac{1}{8} => ({2^{2} )}^{x-1} =\frac{1}{2^{3} } => 2^{2(x-1)}=2^{-3} => 2(x-1)=-3 => 2x-2=-3 => 2x=-3+2 => 2x=-1 => x=-\frac{1}{2}$

Explicație pas cu pas: