(solved)Question 14 SSC-CGL 2020 March 3 Shift 2

What is 1 + 4 + 9 + 16 + 25 + . . . n²?
(Rev. 03-Aug-2022)

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Parveen,

Question 14
SSC-CGL 2020 Mar 3 Shift 2

What is 1 + 4 + 9 + 16 + 25 + . . . n²?

Solution in Brief

This is a standard formula. I will list all such formulas.

Sum of first N natural numbers is N(N + 1)/2

Sum of squares of first N natural numbers is N(N + 1)(2N + 1)/6

Sum of cubes of first N natural numbers is [N(N + 1)/2]²


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