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CBSE Class 11-science Answered

Q-6 IS ATTACHED.
 
Asked by mahesh_udr2000 | 29 Aug, 2017, 03:24: PM
answered-by-expert Expert Answer
begin mathsize 16px style straight a plus ar plus ar squared plus........... equals 2008
Sum space of space infinite space terms
fraction numerator straight a over denominator 1 minus straight r end fraction equals 2008...... left parenthesis straight i right parenthesis
New space series
straight a squared plus straight a squared straight r squared plus straight a squared straight r to the power of 4 plus....... equals 2008
fraction numerator straight a squared over denominator 1 minus straight r squared end fraction equals 2008....... left parenthesis ii right parenthesis
Dividing space left parenthesis ii right parenthesis space by space left parenthesis straight i right parenthesis
fraction numerator straight a over denominator 1 plus straight r end fraction equals 8
then space straight a equals 2008 minus 2008 straight r
straight a equals 8 minus 8 straight r
2008 minus 2008 straight r equals 8 minus 8 straight r
straight r equals 2000 over 2016
straight r equals 125 over 126
straight m equals 125 space and space straight n equals 126
straight m plus straight n equals 251
end style
Answered by Sneha shidid | 06 Dec, 2017, 02:38: PM

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