Answer
False
Work Step by Step
Given: $x=f(t)$ and $y=g(t)$ are twice differentiable, then
$\frac{d^{2}y}{d^{2}x}=\frac{\frac{d}{dt}(dy/dx)}{dx/dt}$
This is the correct statement.
Hence, the statement is false.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.