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Find sum(r=1)^n (1^3 + 2^3 + 3^3 + …… +...

Find ` sum_(r=1)^n (1^3 + 2^3 + 3^3 + …… + r^3) / (r(r + 1))`

Text Solution

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The correct Answer is:
`(n ( n+4))/( 6)`
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