If the rate of increase of \( \frac{x^{2}}{2}-2 x+5 \) is twice the rate of decrease of it, then...

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If the rate of increase of \( \frac{x^{2}}{2}-2 x+5 \) is twice the rate of decrease of it, then \( x \) is
(A) 2
(B) 3
(C) 4
(D) 1
\( P \)
W.
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