Diketahui fungsi f(x) = 2x + 1 dan (fog) (x + 1) = -2x^2 -4x -1. Nilau g (-2) adalah.. Tolong dijwb ya
Matematika
nurdya1234
Pertanyaan
Diketahui fungsi f(x) = 2x + 1 dan (fog) (x + 1) = -2x^2 -4x -1. Nilau g (-2) adalah..
Tolong dijwb ya
Tolong dijwb ya
1 Jawaban
-
1. Jawaban Anonyme
Bab Fungsi
Matematika SMA Kelas XI
(fog) (x + 1) = -2x² - 4x - 1
(fog) (x - 1 + 1) = -2(x - 1)² - 4x - 1
(fog) (x) = -2(x² - 2x + 1) - 4x - 1
(fog) (x) = -2x² - 4x - 2 - 4x - 1
(fog) (x) = -2x² - 8x - 3
2 g (x) + 1 = - 2x² - 8x - 3
2 g (x) = -2x² - 8x - 4
g(x) = -x² - 4x - 2
g(-2) = - (-2)² - 4 . (-2) - 2
g(-2) = -4 + 8 - 2
g(-2) = 2