Diketahui f(x)=3x+5 dan g(x)=2x-7 maka nilai dari (f 0 g) (-2) adalah

Materi Fungsi

f(x) = 3x + 5
g(x) = 2x - 7

(f o g)(x) = f(g(x)) = f(2x - 7) = 3(2x - 7) + 5 = 6x - 16
(f o g)(-2) = 6(-2) - 16 = -28

f(x) = 3x +5 dan g(x) = 2x-7
(fog)(-2) =
f { g (-2) }
= f (2×-2 -7)
= f (-4 -7)
= f (-11)
= 3×-11 +5
= -33 +5
= -28