Prove, by mathematical induction, that for all positive integers n, the following propositions is true.
n*1+(n-1)*2+(n-2)*3+...+3*(n-2)+2*(n-1)+1*n=n(n+1)(n+2)/6
PLEASE HELP WITH STEPS. THANK YOU SO MUCH
收錄日期: 2021-04-22 00:50:51
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