Complete the function that calculates the sum of the first  n+1 terms of the geometric series a,ar,ar^2ar^3,ar^4…ar^n

Q: Find the sum of the series: (- 1)"4" 3 (2n + 1)!

A: We know sin x = ∑n=0∞(-1)n x2n+1(2n+1)! Putting x=2, we get sin 2 = ∑n=0∞(-1)n 22n+1(2n+1)!

Q: use series to evaluate

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Q: What is the sum of the series?

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Q: Find the 81st term in the series defined by Sn= (n-3)²+ (n-5)²+ (n-7)² +(n-9)² +..

A: For this series, 1st term = (n-3)2 2nd term = (n-5)2 So like this nth term = [n-(2p+1)]2 So from…

Q: If the first term and nth term of a series are -3 and 10+2an-1  Then find second third and fourth…

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