Question: 1 3 + 2 3 + 3 3 + cdots + n 3 = n 2 ( n + 1 ) 2 4 = (

13+23+33+cdots+n3=n2(n+1)24=(1+2+cdots+n)2
1 3 + 2 3 + 3 3 + cdots + n 3 = n 2 ( n + 1 ) 2 4

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