Prove by induction:1*2+2*3+3*4+...+n(n+1)=n(n+1)(n+2)/3
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Originally Posted by sderosa518 Prove by induction:1*2+2*3+3*4+...+n(n+1)=n(n+1)(n+2)/3 Base case: Assume correctness for . Prove for : LHS: RHS:
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