Hello! Could somebody prove this for me? 1+3+6+...+n(n+1)/2=n(n+1)(n+2)/6 I mean for n=k+1
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Originally Posted by Sylvie Hello! Could somebody prove this for me? 1+3+6+...+n(n+1)/2=n(n+1)(n+2)/6 I mean for n=k+1 What've you done and where're you stuck? Tonio
Thank you, I think I understand ;]
Originally Posted by Sylvie Hello! Could somebody prove this for me? 1+3+6+...+n(n+1)/2=n(n+1)(n+2)/6 I mean for n=k+1 P(k) P(k+1) Proof that P(k+1) will also be true if P(k) is true which, if P(k) is valid, is
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