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Fungsi kuadrat f(x)=x pangkat 2 -2x +m memiliki nilai optimum -25. Tentukan nilai m
Pembahasan :
f(x) = x² - 2x + m, memiliki nilai optimum -25
a = 1
b = -2
c = m
yp = -25
-D/4a = -25
-D = -25(4a)
D = 100a
b² - 4ac = 100a
(-2)² - 4(1)(m) = 100(1)
4 - 4m = 100
-4m = 96
m = -24
a = 1
b = -2
c = m
yp = -25
-D/4a = -25
-D = -25(4a)
D = 100a
b² - 4ac = 100a
(-2)² - 4(1)(m) = 100(1)
4 - 4m = 100
-4m = 96
m = -24
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