Dik: f(x)=2x²+5x , g(x)=1/x, Dit: a). (fog)(x) , b). (gof)(1)

a.(fog)(x)
=f(g(x))
=2(1/x)^2+5(1/x)
=(2+5x)/x^2

b.(gof)(x)
=g(f(x))
= 1/(2x^2+5x)
=(gof)(1)
= 1/2.1^2+5.1
= 1/7