Diketahui f(x) = 2x + 3, g(x) = 2x² + 3x - 4, dan h(x) = 4x-1. tentukan (f o g o h) (x)
Ganjar64
(f o g o h)(x) = f o (g o h)(x) = f o g(h(x)) = (f o y)(x) y = g(h(x)) = 2(4x-1)²+3(4x-1)-4 = 2(16x²-8x+1)+12x-3-4 = 32x²-16x+2+12x-3-4 = 32x²-4x-5
(f o g o h)(x) = (f o y)(x) = f(y(x)) = 2(32x²-4x-5)+3 = 64x²-8x-10+3 = 64x²-8x-7
= f o g(h(x))
= (f o y)(x)
y = g(h(x))
= 2(4x-1)²+3(4x-1)-4
= 2(16x²-8x+1)+12x-3-4
= 32x²-16x+2+12x-3-4
= 32x²-4x-5
(f o g o h)(x) = (f o y)(x)
= f(y(x))
= 2(32x²-4x-5)+3
= 64x²-8x-10+3
= 64x²-8x-7