In figure the block moves downwards with velocity v1, the wedge moves rightwards with velocity v2. The correct relation between v1 and v2 isOptions:v2 = v1v2 = v1 sin θ2 v2 sin θ = v1v2 (1+sin θ)= v1

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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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