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Let P(x, y) be a variable point on y = (...

Let P(x, y) be a variable point on `y = (x^(2))/(2) - 2x + 5`. If the rate of decrease of y is thrice rate of decrease of x, then x is equal to

A

4

B

5

C

7

D

10

Text Solution

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The correct Answer is:
B
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