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![[Post New]](/templates/default/images/icon_minipost_new.gif) 11 Apr 2008 16:37:37 IST
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q) Find the condition on a,b,c,d for which 2ax3 + bx2 + cx + d = 0 and 2ax2 + 3bx + 4c = 0 have a common root.
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There is no better feeling in this world than being a winner! |
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11 Apr 2008 16:44:27 IST
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are a,b,c.d in a.p...??
nt sure though.....
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see da "letter to santa" in ma album ...!!! |
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11 Apr 2008 17:24:20 IST
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don't know the answer..plz post the soln!
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There is no better feeling in this world than being a winner! |
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11 Apr 2008 17:29:29 IST
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pata nahi... kabhi aisa question kiya nahi
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11 Apr 2008 17:32:41 IST
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see the next post
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11 Apr 2008 17:35:02 IST
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nice qns , but idea at all!
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>>sugeet->
--catalysingsuccess |
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11 Apr 2008 17:41:36 IST
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the next post
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11 Apr 2008 17:42:31 IST
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ashish u post it na... i want to know how u proceeded ?
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11 Apr 2008 17:48:52 IST
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let z be the common root
then 2az3 + b z2 + cz + d =0 ...............1
and 2az2 + 3bz + 4c = 0........................2
equation 1 is
z( 2az2 + bz + c) +d = 0
replace the value of 2az2 from second and replace in 1
2bz2 + 3cz - d =0.......................3
now
z is the common root of 2 and 3
its easy afterwards
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11 Apr 2008 17:55:31 IST
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please check
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11 Apr 2008 17:57:53 IST
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i think u r rite... but u dont hav options na nahi to confirm ho jata...
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