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The parabola y² = 4ax passes through (4, 4). Its focus is:
A(1, 0)
B(2, 0)
C(4, 0)
D(0, 1)
Answer & Solution
Correct answer: A. (1, 0)
Substituting (4, 4) gives 16 = 16a, so a = 1 and the focus is (a, 0) = (1, 0).
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