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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: A.P
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[Post New]19 May 2008 19:41:10 IST
    Subject: A.P
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akshayarora9 (2)

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the ratio of sum of first  ' m '  and first  ' n '  terms of an A.P is m2 : n2  . Find ratio of mth and nth term of A.P .
    
[Post New]19 May 2008 20:22:50 IST
    Subject: A.P
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mukundmadhav (460)

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Is the answer 2m-1/2n-1

I'll post solution if its right
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[Post New]19 May 2008 22:46:44 IST
    Subject: A.P
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pink_ele (1158)

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Sm:Sn=m^2/n^2
m/2(2a+(m-1)d):n/2(2a+(n-1)d=m^2/n^2
(2a+(m-1)d):(2a+(n-1)d=m/n
now put m=2k-1
and.....n=2l-1
dis gives
(a+(k-1)d):(a+(l-1)d=2k-1/2l-1
hence d proof
nobody is wrong
even a stopped clock is right twice a day
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