Jawab:
Penjelasan dengan langkah-langkah:
f(x) = x - 2 misalkan f(x) = a
a = x - 2
a + 2 = x
(gof) (x) = x^2 - 4x + 7
g (f(x)) = x^2 - 4x + 7
g (a) = (a + 2)^2 - 4(a + 2) + 7
= a^2 + 4a + 4 - 4a - 8 + 7
= a^2 + 3
g(x) = x^2 + 3
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Jawab:
Penjelasan dengan langkah-langkah:
f(x) = x - 2 misalkan f(x) = a
a = x - 2
a + 2 = x
(gof) (x) = x^2 - 4x + 7
g (f(x)) = x^2 - 4x + 7
g (a) = (a + 2)^2 - 4(a + 2) + 7
= a^2 + 4a + 4 - 4a - 8 + 7
= a^2 + 3
g(x) = x^2 + 3