# Sum Big-O

If

$N=\sum _{ i=0 }^{ n }{ { i }^{ 3 } }$

which of the following is equal to $$N$$?

A: $$\Theta(n^{4})$$

B: $$\Theta(n^{5})$$

C: $$O(n^{5})$$

D: $$\Omega(n^{3})$$

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