Question:medium

Let \( f(x) = x\sqrt{4ax - x^2, \; a > 0 \) then \( f'(x) \) at \( x = 2a \) is:}

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If derivative at a point is positive, the function is increasing at that pointAlways check the sign after differentiation.

Updated On: May 6, 2026

Does not exist
Zero
Decreasing
Increasing

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The Correct Option is D

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