Question

Suatu fungsi kuadrat f(x) mempunyai nilai maksimum 5 dan nilai f(2)=f(4)=0. fungsi kuadratnya adalah

Answer 1

F(x) = a(x - 2)(x - 4)



f(3) = 5
a(3 - 2)(3 - 4) = 5
a(1)(-1) = 5
-a = 5
a = -5

f(x) = -5(x - 2)(x - 4) = -5(x² - 6x + 8) = -5x² + 30x - 40