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![[Post New]](/templates/default/images/icon_minipost_new.gif) 4 Dec 2007 20:18:17 IST
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Suppose we are given a cubic equation in x. How do we find that whether this equation will have roots? Does this have some other method other than finding all 3 values of x, Just like in case of quadratic we find by whether D>0 or D<0? Please reply. Rates assured.
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The quality of a person's life is in direct proportion to their commitment to excellence, regardless of their chosen field of endeavor.
It is during our darkest moments that we must focus to see the light.
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4 Dec 2007 20:24:15 IST
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to find whether roots are real or not try descartes rule...........
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LOKESH SARDANA,
department of Production and Industrial engineering,
Indian Institute of Technology,Roorkee.
Happiness can be found, even in the darkest of times, if one only remembers to turn on the light.
Albus Dumbledore
Harry Potter and the Prisoner of Azkaban movie
There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.
-- Albert Einstein
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4 Dec 2007 21:10:28 IST
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Descartes rule only tells the number of +ve or -ve roots of an equation on the basis of change of signs. It does not tell whether an equatiion has real roots or not?
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The quality of a person's life is in direct proportion to their commitment to excellence, regardless of their chosen field of endeavor.
It is during our darkest moments that we must focus to see the light.
Check out my blog at:
http://tarinbansal.blogspot.com/
Posts:
Can marks really judge a student??
Some myths about Chemical Engineering.
(A must see for every student)
Back to goiit, this time with Baby Veerappan. :D |
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sorry dude................descartes rule tells us no. of +ve and -ve REAL roots...................so, total no. of real root = (no. of +ve real roots )+(no. of -ve real roots).....................
and by the way..........we can't describe imaginary root as positive or negative..............
got it!!!
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LOKESH SARDANA,
department of Production and Industrial engineering,
Indian Institute of Technology,Roorkee.
Happiness can be found, even in the darkest of times, if one only remembers to turn on the light.
Albus Dumbledore
Harry Potter and the Prisoner of Azkaban movie
There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.
-- Albert Einstein
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4 Dec 2007 21:30:49 IST
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Abe haan yaar,
sahi keh raha hai.
Thanx dude, here's a salute for you as promised.
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The quality of a person's life is in direct proportion to their commitment to excellence, regardless of their chosen field of endeavor.
It is during our darkest moments that we must focus to see the light.
Check out my blog at:
http://tarinbansal.blogspot.com/
Posts:
Can marks really judge a student??
Some myths about Chemical Engineering.
(A must see for every student)
Back to goiit, this time with Baby Veerappan. :D |
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