Gimana sih caranya tolong bantuin fungsi f(x)=2x-3/4x+1 x=-1/4 g(x)=x-2 invers (fog) adalah (fog)-1(x)

f(x)=2x-3/4x+1
g(x)=x-2
(fog)(x)=f(g(x))
f(x-2)=2(x-2)-3/4(x-2)+1
2x-4-3/4x-8+1=2x-7/4x-7 karena f0g(x)=y maka
y=2x-7/4x-7
y(4x-7)=2x-7
4xy-7y=2x-7
4xy-2x=7y-7
x(4y-2)=7y-7
x=7y-7/4y-2
(fog)-1(x)=7x-7/4x-2
gantikan variabel x dengan -1/4
7.-1/4-7  /  4.-1/4-2
-7/4-7/-3
-7/4-28/4/-3
-35/4  x  -1/3 =35/12