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4y = 4x² - 4x + 7
y= 4x²/4 - 4x/4 + 7/4
y=x² - x + 7/4
x= -b/2a
= - (-1)/2(1)
= 1/2
D= b² - 4ac
= (-1)² - 4(1)(7/4)
= 1 - 7
= - 6
y= -D/4a
= -(-6)/4(1)
= 6/4
= 3/2
jadi titik baliknya (1/2,3/2)
Dengan:
a = 1
b = -1
c = 7/4
Maka, koordinat titik puncak: