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Jadi fungsi g (x) = -2x + 1
4. (f o g)(x) = 6x +3
f(g(x)) = 6x + 3
2f(x) – 3 = 6x +3
2g(x) = 6x + 6
g(x) = 3x +3
Jadi, g(x) = 3x +3
5. (f o g)(x) = 2x + 6
f(g(x)) = 2x + 6
f(x + 1 ) = 2x + 2 + 4
f(x + 1) = 2(x + 1) + 4
sehingga,
f(x) = 2x + 4
jadi, f(x) = 2x + 4
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