fungsi f(x) = 2x+3/4-5x,x≠ 4/5 .nilai f-¹(x-2)=

f(x) = 2x+3/4-5x
f^-1(x-2)=...?
cari f^-1(x)
f(x) = 2x+3/4-5x
y = 2x+3/4-5x
y(4-5x) = 2x+3
4y-5xy = 2x+3
2x+5xy = 4y-3
x(2+5y) = 4y-3
x = 4y-3/2+5y
maka f^-1(x) = 4x-3/2+5x
f^-1(x-2)= 4(x-2)-3 / 2+5(x-2)
= 4x-8-3 / 2+5x-10
= 4x-11 / 5x-8