A Level

MATHEMATICS · Single correct · A Level · Mathematics · Differentiation · Differentiation

Problem

If y=bcos⁡log⁡(xn)ny = b \cos \log \left( \frac{x}{n} \right)^n then dydx=\frac{dy}{dx} = (a) −nbsin⁡log⁡(xn)n-n b \sin \log \left( \frac{x}{n} \right)^n (b) nbsin⁡log⁡(xn)nn b \sin \log \left( \frac{x}{n} \right)^n (c) −nbxsin⁡log⁡(xn)n\frac{-n b}{x} \sin \log \left( \frac{x}{n} \right)^n (d) None of these

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