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[Post New]6 Dec 2007 12:35:38 IST
    Subject: if a,b,c,d are in H.P. then prove that ab+bc+cd=3da
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gunjandream4u (0)

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Olaaa!! Perrrfect answer. 0  [0 rates]
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if a,b,c,d are in H.P. then prove that ab+bc+cd=3da
    
 

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