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The value of 2*1! + 5*2! + 10*3! +17*4!..... till 10 terms is :what i did for this was break it into two parts.. general term : (n^2 +1)n! ∑n^2(n)! +∑n! i simplified the second term to (n+1)!-1, by the method of shifting the sum and subtracting it from itself (because it is an agp), the value i got for the second part is : (11)!-1 i cannot figure out how to find the sum of the first part,please help!also please tell me if I was doing the right thing.Thank You.
Sorry my bad the sum of the second part is wrong due to a calculation mistake,so now the sum of both the parts are remaining to be found.
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