" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
g (x) = 2x + 1)
h (x) = (x + 3)
(f o g o h) (x) = f (g o h) (x)
4x² + 36x + 48 = f (g (h (x)))
= f (g (x + 3))
= f (2 (x + 3) + 1)
= f (2x + 6 + 1)
= f (2x + 7)
f(2x + 7) = 4x² + 36x + 54
misal : 2x + 7 = a
2x = a - 7
x = 1/2 (a + 7)
soal menjadi
f (a) = 4{1/2 (a - 7)²} + 36 {1/2 (a - 7)} + 54
= 4 { 1/4 (a² - 14a + 49)} + 18 (a - 7) + 54
= a² - 14a + 49 + 18a - 126 + 54
= a² + 4a -23
f (x) = x² + 4x - 23 ..... jawaban :b