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Using a directrix of y = 5 and a focus of (4, 1), what quadratic function is created?
a
f(x) = one fourth (x − 4)2 − 3
b
f(x) = one eighth (x + 4)2 − 3
c
f(x) = −one eighth (x − 4)2 + 3
d
f(x) = −one fourth (x + 4)2 − 3
Sagot :
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