calculus
posted by Taeyeon .
3. For what value of k will x+k/x have a relative maximum at x = 2?
A. 4 B. 2 C. 2 D. 4 E. None of these

y = x + k/x
y' = 1  k/x^2
1  k/x^2 = 0
1  k/4 = 0
k = 4
(D)
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