Math, asked by swaggybaba255, 1 year ago

Summation r=1 (r+1) (2r-1) find the sum

Answers

Answered by kritika9658
8

Answer:

easy to much

Step-by-step explanation:

understand the question first

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Answered by AnanyaPatra
4

R=1[r+1][2r-1]

=[1+1][2*1-1]

=2+(-1)

=-1

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