Tuesday, December 13, 2011

Discrete Mathematics Question?

Having a little trouble with this one. Please don't laugh because I know it is supposed to be simple... This is the question.... "Prove that 1*1!+2*2!+...+n*n!=(n+1)!-1 whenever n is an element of the positive integers." We are supposed to do this in two lines at most. What do you think? Any input would be greatly appreciated. I just can't seem to fit this proof into a couple of lines is all!

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