Misalkan f: R → R dan g: R {4} → R dengan f(x) = 6x + 3 dan g(x) = tentukan

Penjelasan dengan langkah-langkah:

Gof(x) = 2x²+4x-6

G(f(x)) = 2x ^ 2 + 4x – 6

G(x + 2) = 2x ^ 2 + 4x – 6

Misal x + 2 = a

x = a – 2

G(a) = 2(a² – 4a + 4) + 4a – 8 – 6

G(a) = 2a ^ 2 – 8a + 8 + 4a – 14

G(a) = 2 * (a – 2) ^ 2 + 4(a – 2) – 6 G(x) = 2x ^ 2 – 4x – 6

G(a) = 2a ^ 2 – 4a – 6

X1 dan X2 akar dari…

G(x) = C 2x ^ 2 – 4x – 6 = 0

x ^ 2 – 2x – 3 = 0

(x – 3)(x + 1) = 0

X1 = 3

X * 2 = – 1

X1+2(X2)

=3+2(-1)

= 3-2

= 1