Find the sum of the series: . .
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Originally Posted by Soroban Find the sum of the series: . . Quick already solved it.
It is just mathematical iduction
Last edited by ThePerfectHacker; December 30th 2006 at 03:35 PM.
I don't know where it was solved, but even without (explicit) induction:
So summing for k = 1 till n gives (n+1)!-1 since all intermediate terms cancel out.
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