f(x)=x+1/x-2 g(x)=2x+3 tentukan a.(fog)(x) b.(gof)(2) tolong bantu ,dikumpulkan

a) (fog)(x) = f(g(x))
=g(x)+1/g(x)-2
= 2x-3+1/2x-3-2
= 2x-2/2x-5
= 2(x-1)/2x-5
b) (gof) (x) =g(f(x))
=2(x+1/x-2)-3
= 2x+2/x-2 -3