Jika f(x)=x2-3x+2 ,g(x)=x-1,dan h(x)=3x+1 komposisi fungsi (fogoh)(x)

(f•g•h)(x) = f(g(h(x)))
= f(g(3x + 1)
= f(3x + 1 – 1)
= f(3x)
= (3x)^2 – 3(3x) + 2
= 9x^2 – 9x + 2

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