# Summation rule

How to prove

1^3+2^3+3^3+...+n^3=[n^2 X (n+1)^2]/4

Update:

thank you ✡ HYPERCUBE ✡

but i'd like to know the proof of this identity,not by the principle of mathematical induction.

### 1 Answer

Rating

- ✡ HYPERCUBE ✡Lv 68 years agoFavorite Answer
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2013-02-15 00:32:13 補充：

Source(s): My Maths World

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