Diketahui. f(x)=2x²+5 g(f)=x+1 Tentukan. a. (fog) (x) b. (gof) (x) c. (fog) (x)

a. (fog) (x) = 2×^2 + 5
= 2 (×+1)^2 + 5
= 2 (×^2 + 1) + 5
= 2×^2 + 1 + 5
= 2× + 6...
b. (gof) (x)= x + 1
= (2×^2 + 5) + 1
= 2×^2 + 6...
c. penyelesaian c sama dengan pertanyaan a...