The sum of the series \( 1^{3}+2^{3}+3^{3}+\ldots \ldots \ldots . . n^{3} \) is....
The sum of the series \( 1^{3}+2^{3}+3^{3}+\ldots \ldots \ldots . . n^{3} \) is
\( \mathrm{P} \)
(1) \( \left\{\frac{(n+1)}{2}\right\}^{2} \)
(2) \( \left\{\frac{n}{2}\right\}^{2} \)
(3) \( n\left(\frac{n+1}{2}\right) \)
(4) \( \left\{n \frac{(n+1)}{2}\right\}^{2} \)
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