Tolong banget ya yng jago mtk
Jika f(x) =3x+2, g(x) =x²+x-2, h(x) = x-2 dan (f o g o h)(a) = – 4, tentukan nilai a!
Jawab:
Penjelasan dengan langkah-langkah:
(fogoh) (a) = -4
(fog) (h(x)) = -4
(fog) (a – 2) = -4
f(g(a – 2)) = -4
f((a – 2)² + (a – 2) – 2) = -4
f (a² – 4a + 4 + a – 2 – 2) = -4
f (a² – 3a) = -4
3 . (a² – 3a) + 2 = -4
3a² – 9a + 2 + 4 = 0
3a² – 9a + 6 = 0
semua dibagi 3
a² – 3a + 2 = 0
(a – 2) . (a – 1) = 0
a – 2 = 0
a = 2
a – 1 = 0
a = 1
Jadi, a = 1 atau a = 2
Detail Jawaban
Kelas 10
Mapel 2 – Matematika
Bab 6 – Fungsi Rasional
Kode Kategorisasi : 10.2.6