(f+g)(3)=16 dan g(x)=x^2+x, maka f(3) bernilai...

(f+g)(3)=16 dan g(x)=x^2+x, maka f(3) bernilai...

JAWAB

g(x) = x² + x

dan

(f+g)(3) = 16

maka
⇨ (f+g)(3) = 16
⇨ f(3) + g(3) = 16
⇨ f(3) + (3²+3) = 16
⇨ f(3) + 12 = 16
⇨ f(3) = 16-12
⇨ f(3) = 4