The displacement of a particle is represented by the following equation: s = 3t3 +7t2 +5t+8 where s is in metre and t in second. The acceleration of the particle at t = 1s is(a) 14 m/s2(b) 18 m/s2(c) 32 m/s2(d) Zero

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Sum of series 2[n/2] ! [n/2]!/ n! [2Co-2C2+3C2....+[-1]^n[n+1]2Cn] where n is an even positive integer. Kindly provide solution of this question and how to generalise this. How do we know that which expansion will give this?

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