Matematika

Pertanyaan

fog)(x) = 2x^2 + 2x + 5 dengan g(x) = x^2 + x + 2. nilai f(x) adalah....

1 Jawaban

  • (f o g) (x)      = 2x² + 2x + 5
    f(x² + x + 2) = 2x² + 2x + 5
                        = (x² + x + 2) + (x² + x + 3)
                        = (x² + x + 2) + (x² + x + 2) + 1
                        = 2(x² + x + 2) + 1

    Maka,
    f(x) = 2x + 1

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