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1^3 + 2^3 + 3^3 +4^3 ... n^3 = ? |
2010-01-29 |
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ireimaima pose la question :
Hi..
Can u please help me with this question..
I find that when i test eg: n=2 for n (n+1) /4,
it seems that it does not giving me the right answer of 1^3 + 2^3 = 9
but 3/2... i'm confuse..can u please help me..thanks so much
Prove that:
1^3 + 2^3 + 3^3 +4^3………………………………..n^3 = n (n+1) /4
Penny Nom lui répond. |
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