Jawab:
Penjelasan dengan langkah-langkah:
grafik memotong
i) sumbu x di x1= -1 dan x2= 3
f(x) = a (x - x1)(x - x2)
f(x)= a (x + 1) ( x- 3)
ii) memotong sumbu y di (0, 6)
f(0) = 6
a(0 + 1)(0 -3) = 6
-3a= 6
a= -2
iii) persamaan fungsi
f(x) = -2 (x + 1)( x - 3)
f(x) = - 2 (x² - 2x - 3)
f(x) = -2x² + 4x + 6
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Jawab:
Penjelasan dengan langkah-langkah:
grafik memotong
i) sumbu x di x1= -1 dan x2= 3
f(x) = a (x - x1)(x - x2)
f(x)= a (x + 1) ( x- 3)
ii) memotong sumbu y di (0, 6)
f(0) = 6
a(0 + 1)(0 -3) = 6
-3a= 6
a= -2
iii) persamaan fungsi
f(x) = -2 (x + 1)( x - 3)
f(x) = - 2 (x² - 2x - 3)
f(x) = -2x² + 4x + 6