Problem:
Sum the series: (12+1)1!+(22+1)2!+(32+1)3!⋯+(n2+1)n!
Source: A book on algebra.I came across this interesting looking series and decided to tackle it.
My try :
All I have tried is taking the rth term and summing it, but in vain:
Tr=(r2+1)r!
Tr=r2⋅r!+r!
Now I don't know how to sum either of these terms.I'm not familiar with uni level math as I'm a high school student. All help appreciated!
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