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June 2018 p11 q2
1108
A point is moving along the curve \(y = 2x + \frac{5}{x}\) in such a way that the \(x\)-coordinate is increasing at a constant rate of 0.02 units per second. Find the rate of change of the \(y\)-coordinate when \(x = 1\).
Solution
Given the curve \(y = 2x + \frac{5}{x}\), we need to find \(\frac{dy}{dt}\) when \(x = 1\) and \(\frac{dx}{dt} = 0.02\).