Question

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Answer 1

FUNGSI KUADRAT

f(x) = y = a(x - xp)² + yp

• titik puncak P(xp,yp) = P(2,8)

xp = 2

yp = 8

f(x) = a(x - 2)² + 8

• melalui (0,4)

f(0) = 4

a(0 - 2)² + 8 = 4

4a = 4 - 8

4a = -4

a = -1

Fungsi kuadrat dari grafik tersebut :

f(x) = -1(x - 2)² + 8

f(x) = -(x² - 4x + 4) + 8

f(x) = -x² + 4x - 4 + 8

f(x) = -x² + 4x + 4