Question

Resolva a seguinte equação exponencial:

$4 x^{2-1} + 8^{x}$

Answer 1

Se for 4^(x²-1) =8^x

2^2(x²-1) = 2^(3x)   

2(x²-1)=3x

2x²-2=3x

2x²-3x-2=0

x'=[3+√(9+16)]/4 = [3+5]/4=2


x''=[3-√(9+16)]/4 = [3-5]/4=-1/2