Jawaban = (-1, -9)
y = x²+2x-8
y = ax²+bx+c
D = b²-4ac
= 4-4(1)(-8)
= 36
mencari titik puncak (x, y)
*Alternatif 1, gunakan rumus
Puncak = (-b/2a, -D/4a)
= (-2/2, -36/4)
= (-1, -9)
*Alternatif 2, gunakan turunan=0
y' = 2x+2
0 = 2x+2
x = -1
substitusi
y = (-1)²+2(-1)-8
y = -9
Jadi koordinat titik puncaknya (-1, -9)
#Solved by Pramudya Vito Agata
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Verified answer
Jawaban = (-1, -9)
Grafik Fungsi Kuadrat
Matematika X SMA
y = x²+2x-8
y = ax²+bx+c
D = b²-4ac
= 4-4(1)(-8)
= 36
mencari titik puncak (x, y)
*Alternatif 1, gunakan rumus
Puncak = (-b/2a, -D/4a)
= (-2/2, -36/4)
= (-1, -9)
*Alternatif 2, gunakan turunan=0
y' = 2x+2
0 = 2x+2
x = -1
substitusi
y = (-1)²+2(-1)-8
y = -9
Jadi koordinat titik puncaknya (-1, -9)
#Solved by Pramudya Vito Agata