Q. 204.5( 2 Votes )

# If 1 + 2 + 3 + . . . + n = k then 13 + 23 + … + n3is equal toA. k2B. k3C. D. (k + 1)3

Answer :

Sum of first n natural numbers is S = = k

Sum of first n natural squares is S =

Which is k2

So the correct option is A.

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