lemon14
Oct 6, 2013, 04:27 AM
1*1! + 2*2! + 3*3! +... +n*n! And how do you get it?
Celine91
Oct 6, 2013, 01:41 PM
Not sure what you exactly mean ! But refer to this it may help..
How to prove 1*1!+2*2!+3*3!...n*n!=(n+1)! -1 using mathematical induction? plz help? - Yahoo! Answers (http://answers.yahoo.com/question/index?qid=20081030062651AAemMsU)