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the weighted mean of first n natural nu...

the weighted mean of first n natural numbers whose weights are equal to the squares of corresponding numbers , is

A

`(n +1)/(2)`

B

`(3n(n +1))/(2(2n+1)`

C

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

D

`(n(n+1))/2`

Text Solution

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The correct Answer is:
B
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