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Question
If x = t2, y = t3, then \[\frac{d^2 y}{d x^2} =\]
Options
3/2
3/4t
3/2t
3t/2
Solution
(b) 3/4t
Here,
\[x = t^2 \text { and y }= t^3 \]
\[ \Rightarrow \frac{d x}{d t} = 2t \text { and } \frac{d y}{d t} = 3 t^2 \]
\[ \therefore \frac{d y}{d x} = \frac{3t}{2}\]
\[ \Rightarrow \frac{d^2 y}{d x^2} = \frac{3}{2}\frac{dt}{dx} = \frac{3}{4t}\]
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