anonymous
  • anonymous
find the sum of (1/(2^2-1) +1/( 4^2-1)+1/(6^2-1)+...+1/(20^2-1))
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
|dw:1350388976936:dw|
anonymous
  • anonymous
how did u get tis
anonymous
  • anonymous
|dw:1350389094272:dw|

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anonymous
  • anonymous
difference of squares on denominator a^2-b^2=(a-b)(a+b)
anonymous
  • anonymous
dats partial sum rite
anonymous
  • anonymous
yes
anonymous
  • anonymous
@mahmit2012 but ans is 10/21 can u show ur steps of partial sums
anonymous
  • anonymous
|dw:1350390395436:dw|
anonymous
  • anonymous
because 2n when n = 10 is 20 .. just to do the correction for mahmit2012
anonymous
  • anonymous
@Coolsector thanks..
anonymous
  • anonymous
oh yes uper bound is 10 .
anonymous
  • anonymous
ya got it finally:) thanks ppl

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