Tentukan fungsi invers dari g(4) akar 2x+8

g(x) = √(2x +8) . kuafratkan
{ g(x) }^2 = 2x +8
2x = {g(x)}^2 -8
x = {g(x)}^2 -8 /2
f-1(x) = (x^2-8)/2