Math, asked by AJ484, 1 month ago

how did it came rhs =LHS ?

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Answers

Answered by Umra01

5

Step-by-step explanation:

because formula of sum of first n natural no.is =

n(n-1)/2

and formula of sum of first n square natural no. is

n(n+1)(2n+1)/6

and some of first n cube natural no = [n(n-1)/2] whole square

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