JEE Advanced Mathematics question
A particle moving on a curve has the position given by , at time where is a thrice-differentiable function. Then the velocity of the particle at time is
Answer: (B)
Solution
= f'' t + f' t + f''' t - f'' t = \{f'(t) + f'''(t)\} t,
= f'' t - f' t - f''' t - f'' t = -\{f'(t) +
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