SOLUTION: Prove by induction that for all n that are positive natural numbers: (Signma n, i=1) i^3 = ((n(n-1))/2)^2 Comments: I have proved it for the base case, however, I am unsure

Question 839541: Prove by induction that for all n that are positive natural numbers:
(Signma n, i=1) i^3 = ((n(n-1))/2)^2

Comments: I have proved it for the base case, however, I am unsure as to how I should proceed. Any help would be much appreciated, I am really trying hard to understand induction. Thank you SO much.
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
Assume that the summation holds for some n = k, where k >= 1. Prove that it must hold for n = k+1. Then by induction, you are done, because n = 1 implies that the summation holds for n = 2, which implies that the summation holds for n = 3, etc.
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