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Find the sum of odd integers …

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Find the sum of odd integers from 1to2001?
  • 2 answers

Sehaj Gamer? 4 years, 5 months ago

Use the formulas Sn=n/2(a+l)

Yogita Ingle 4 years, 5 months ago

The series of odd integers from 1 to 2001 is,1,3,5,7..............,2001

a=1

d=3−1=2

l=2001

an​ = a+(n−1)d

2001=1+(n−1)2

2000=2(n−1)

∴n=1001

Sn​=n/2 ​[a+l]

=1001/2 ​[1+2001]

=10,02,001

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