Diketahui f(x)=3x-6 dan g(x)=2x+a.bila (fog)(x) = (gof)(x).... Question from @ristiindahsanti

September 2018 1 243 Report

Diketahui f(x)=3x-6 dan g(x)=2x+a.bila (fog)(x) = (gof)(x)

Takamori37 Asumsi tentukan nilai a.
Dengan demikian,
$$\begin{align}(f\circ g)(x)&=(g\circ f)(x) \\ f(g(x))&=g(f(x)) \\ f(2x+a)&=g(3x-6) \\ 3(2x+a)-6&=2(3x-6)+a \\ 6x+3a-6&=6x-12+a \\ 3a-6&=-12+a \\ 3a-a&=-12+6 \\ 2a&=-6 \\ a&=-3\end{align}$

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ristiindahsanti thanks??? yah

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