Question

Diketahui fungsi f(x) = x - 1, g(x) = 3 - 2x, dan h(x) = x² + x + 1.
Buktikan bahwa (f°(g°h) (x) = ((f°g)°h) (x)

tolong dong pake caranya, sekarang :)

Answer 1

(fo(goh) (x)= (fog)oh) (x)
fo(3-2(x²+x+1) = ((3-2x) -1)oh(x)
fo(3-2x²-2x-2) = (2-2x) oh(x)
(1-2x²-2x) -1 = 2-2(x²+x+1)
-2x²-2x = 2-2x²-2x-2
-2x²-2x = -2x²-2x

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