(1^3 + 2^3 + 3^3 + ... + 10^3) = x?  Choose the correct choice from the following choices
A) 360  B) 380  C) x=420  D) 440  E) 450
We know that (1^3 + 2^3 + 3^3 + ... + n^3) =	1	2n(n + 1)   6   Putting n = 10, required sum = 1	x 10 x 10 x 21 = 2100/5   420   x=420
<result>C</result>
(1^3 + 2^3 + 3^3 + ... + 10^3) = x?