The curve is defined by and for all real

MATHEMATICS · Single correct · CBSE · Mathematics · Continuity and Differentiability · Continuity and Differentiability

Problem

The curve is defined by x=etx=e^{t} and y=t2ety=t^{2}e^{t} for all real tt. Express d2ydx2\dfrac{d^{2}y}{dx^{2}} entirely in terms of xx. (a) 2(1+ln⁡x)x\displaystyle 2\bigl(1+\ln x\bigr)x (b) 2(1+ln⁡x)x\displaystyle \frac{2\bigl(1+\ln x\bigr)}{x} (c) 2+2ln⁡xx2\displaystyle \frac{2+2\ln x}{x^{2}} (d) 2(1+ln⁡x)\displaystyle 2\bigl(1+\ln x\bigr)

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