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Verified answer
Kelas 10 MatematikaBab Fungsi Kuadrat
f(x) = -4x² + 8x - 3
a = -4; b = 8; c = -3
Sumbu simetri
= -b/2a
= -8/(2 . (-4))
= -8/-8
= 1
y = -4 . 1² + 8 . 1 - 3
y = -4 + 8 - 3
y = 1
Titik puncak = { 1, 1 )