Matematika

Pertanyaan

Jika g(x) = x - 4 dan (f o g)(x) = x2 - 5x + 2, fungsi X =

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  • g (x) = x - 4    dan   (f o g) (x) = x² - 5x + 2

    (f o g) (x) = x² - 5x + 2
       f (g (x)) = x² - 5x + 2
       f (x - 4) = x² - 5x + 2
            f (x) = (x + 4)² - 5(x + 4) + 2
            f (x) = x² + 8x + 16 - 5x - 20 + 2
            f (x) = x² + 3x - 2

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