Question

Tentukan invers fungs f(x) = 3x*2-6x+8

Answer 1

F(x) = 3x^2 - 6x + 8
  y  = 3(x^2 - 2x + 8/3) 
y/3 = x^2 - 2x + 1 - 1 + 8/3
y/3 = (x - 1)^2 - 3/3 + 8/3
y/3 = (x - 1)^2 + 5/3
y/3 - 5/3 = (x - 1)^2
(y - 5)/3 = (x - 1)^2
√(y - 5)/3 = x - 1
x = 1 + √(y - 5)/3
f invesr x = 1 + √(x - 5)/3

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