IIT JEE past question AP GP 4

AIEEE Discussion Forum › Algebra questions › IIT JEE past question AP GP 4

The real numbers x1,x2,x3 satisfying the equation x³-x²+bx+c=0 are in AP

find the interval in which b and c lie!

#Mathematics #Algebra

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8 Answers

11

Mani Pal Singh ·2009-03-26 06:05:26

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62

Lokesh Verma ·2009-03-26 06:12:02

C is correct manipal..

but i guess b<=1/3

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11

Mani Pal Singh ·2009-03-26 06:26:08

SIR MERA JO AA RAHA HAI MEIN DAAL RAHA HOON
I MADE A MISTAKE IN THE ABOVE PROCEDURE

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21

tapanmast Vora ·2009-03-26 06:34:48

Sir, I m getting b>=(1/3) [7]

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21

tapanmast Vora ·2009-03-26 07:02:31

are u sure, its b<=1/3

coz i'm gettin opp inequality.......

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62

Lokesh Verma ·2009-03-26 07:07:03

hmm.. let me seee again :)

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Lokesh Verma ·2009-03-26 07:28:54

yes i am sure

take roots as 0,1/3,2/3

I am sure you are making a small mistake somewhere!

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21

tapanmast Vora ·2009-03-26 07:35:28

Yeah!!!

got that mistake!!!

its cumin b<=1/3

@Mani : Yaar take 3 nos in AP as a-d,a,a+d............ it will get much simpler......... apply S.O.R and u get a =1/3

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Your Answer

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