Matematika

Pertanyaan

f(x) = x + 3
g(x) = 2x² - x
(g o f)?

2 Jawaban

  • langsung aja ya

    g(f(x))
    g(x + 3)
    2(x + 3)^2 - (x + 3)
    2(x^2 + 6x + 9) - x - 3
    2x^2 + 12x + 18 - x - 3
    2x^2 + 11x + 15
  • f (x) = x + 3
    g (x) = 2x² - x

    gof (x)
    = g (f (x))
    = g (x + 3)
    = 2 (x + 3)² - (x + 3)
    = 2 (x² + 6x + 9) - x - 3
    = 2x² + 12x + 18 - x - 3
    = 2x² + 12x - x + 18 - 3
    = 2x² + 11x + 15

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