Dik. G(x)=2x+3 dan (gof) (x) 2x²+4x+5,makaf(x)=

jawab

gof(x) = 2x² + 4x + 5
g { f(x)} = 2x² + 4x + 5
2. f(x)  + 3 = 2x² + 4x + 5
2. f(x) = 2x² + 4x + 5 - 3
2. f(x) = 2x² + 4x + 2
f(x) = 1/2 (2x² + 4x + 2)
f(x) = x² + 2x + 1