● Materi : Fungsi Komposisi
● Kode Kategorisasi: 10.2.3
Jawaban:
Penjelasan dengan langkah-langkah:
f(x) = x^2 + 2x - 5. g(x) = x - 2. (fog)(x) = 3.
(fog)(x) = f(g(x))
3 = (x - 2)^2 + 2(x - 2) - 5
3 = x^2 - 4x + 4 + 2x - 4 - 5
0 = x^2- 2x - 5 - 3
0 = x^2- 2x - 8
(x + 2)(x - 4)
x = -2
x = 4
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● Materi : Fungsi Komposisi
● Kode Kategorisasi: 10.2.3
Jawaban:
C. -2 atau 4
Penjelasan dengan langkah-langkah:
f(x) = x^2 + 2x - 5. g(x) = x - 2. (fog)(x) = 3.
(fog)(x) = f(g(x))
3 = (x - 2)^2 + 2(x - 2) - 5
3 = x^2 - 4x + 4 + 2x - 4 - 5
0 = x^2- 2x - 5 - 3
0 = x^2- 2x - 8
(x + 2)(x - 4)
x = -2
x = 4