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RS Aggarwal - Mathematics

13. Some Special Series

Exercise 13A

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Exercise 13B

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Q. 65.0( 2 Votes )

If<span lang="EN-

Class 11th RS Aggarwal - Mathematics 13. Some Special Series

Answer :

It is given that,

Note:

I. Sum of first n natural numbers, 1 + 2 +3+…n,

II. Sum of cubes of first n natural numbers, 1³ + 2³ + 3³ +…..n³,

From the above identities,

We need to find,

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