Matematika

Pertanyaan

F(x)= √5x +1 -4 tentukan f invers (x)

1 Jawaban

  • f(x) = (5x+1)^1/2 - 4
    y = (5x+1)^1/2 -4
    y + 4 = (5x + 1 )^1/2
    (y + 4 )^2 = 5x + 1
    (y + 5 )^2 - 1 = 5x
    maka X = [(y+5)^2 - 1 ] / 5
    f invers (X) = [(x+5)^2-1]/5

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