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INGAT Y=F(X)
y=3x-1
y+1=3x
x=(y+1)/3
f^-1(x)=(x+1)/3
B.f(x)=2x+1/3x-5
y=2x+1/3x-5
y(3x-5)=2x+1
3xy-5y=2x+1
3xy-2x=5y+1
x(3y-2)=5y+1
x=5y+1/(3y-2)
atau
f^-1(x)=5x+1/(3x-2)
2.(fog) (x)=3(2x²+2)-1
=6x²+6-1=6x²+5
3.(fog) (x)=6x²-3x+7
f(g(x))=6x²-3x+7
3(g(x))-2=6x²-3x+7
3(g(x))=6x²-3x+9
g(x)=2x²-x+3