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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: a doubt in quadratic eq plzzzzzzz help
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[Post New]13 Jun 2008 17:37:08 IST
    Subject: a doubt in quadratic eq plzzzzzzz help
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hary (100)

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a doubt in quadratic eq plzzzzzzz help  


if  and  are da roots of da eq ax2 +bx+c=0  and Sn = n +n  then aSn+1 +bSn +cSn-1 =?


A) 0      b)1   c)2   4)5
DONT AIM FOR PERFECTION JUST ACHIEVE IT
    
[Post New]13 Jun 2008 17:45:44 IST
    Subject: Re:a doubt in quadratic eq plzzzzzzz help
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allamraju (3437)

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Ans is 0 bcoz aSn+1+bSn+cSn-1


==0.


as they are roots of the eqn. ax2+bx+c=0.
MAKING A MISTAKE IS HUMAN BUT REPEATING IT IS IDIOTIC.
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