Jika Diketahui f(x)=x²+2 g(x)=4-x Tentukan: A.(fog) (x) B.(gof) (x) C.(fog)-¹(x)

a. (fog)(x)=f(g(x))
=f(4-x)
=x²+2
=(4-x)(4-x)+2
=16-4x-4x+x+2
=18-7x
b. (gof)(x)=g(f(x))
=g(x²+2)
=4-x
=4-x²+2
=6-x²