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-- Mathematics - Section B1
Applications of Derivatives
If the rate of increase of $\frac{x^2}{2}-2 x+5$ is twice the rate of decrease of it, then x is
2
3
4
1
$\frac{dy}{dx}=x-2$ ∴ by given condition
x – 2 = –2 (x – 2) ⇒ x = 2.