(ax^2)-bx+c=0 has distinct roots lyin b/w 0 & 1.then which of the following holds if a,b,c E N.



  1. abc >=20

  2. abc >=25

  3. abc <=16

  4. abc =9.

3 years ago

Share

Answers : (1)

                                        

Here, b/a=0+1=1, c/a=0*1≠0 ( here 0 is not exactly 0) 


 b=a, c=na(n is any integer )


 let, ax2-ax+na=0


  a(x2-x+n)=0


  x2-x+n=0


 x2=x


 12=1. so x=1 is true. 


 a-b+c=0


 -bx+na= 0


-bx=-na


 b=na


  hit and trial, b=a=√3 and c=3 .then,


abc = 9. this is the answer.  plz aprove the answer. 


 

3 years ago

Post Your Answer

More Questions On IIT JEE Entrance Exam

Ask Experts

Have any Question? Ask Experts
Post Question
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details
what is most important topic in maths for entrance of iit ?
 
 
Although balanced study is recommended, the following sections tend to be more scoring: PHYSICS 1. Mechanics 2. Fluidics 3. Electrostatics 4. Electromagnetism & EM Waves 5. Nuclear...
  img
Amit Shekhar 2 months ago
 
Hi, CO-ORDINATE:- straight line, circle, locus. ALGEBRA:- complex no.,qudratic equation,probability,a.p.,g.p. CACULUS:-LIMIT,CONTINUTY,integration,application of calculus. Trigonometry all...
  img
Yash Baheti 2 months ago
hi, iam pragdheesh of class XII. iam willing to write the jee exam for the year 2015. there are two exams (B. E./B. Tech) and (B.E.Arch/B.E.Planning). is it fine to write, how is the course...
 
 
B.Arch is usually taken by students with a deep interest in Engineering drawing and related fields like automobile designing, architecture, etc. and is preferred by a lower number of...
  img
Ravi 14 days ago
 
That is totally upto you. If you are comfortable with the online paper, you can go for the online test also. If not, then only choice left is offline test. There is not much of a difference...
  img
Ravi 13 days ago
 
how about the next quwstion – Which option to be opted for writting the exam online/offline. Give your suggesstions.?
 
pragdheesh 14 days ago
sir i appeard 10 grade in 2013 due to some reasons i discontinued this year and now im gonna write my 12 and iit paper in 2016 will make any difference !!
 
 
  img
Aziz Alam one month ago
 
SIR I COULDNT GET GOOD MARKS IN 10 I GOT AROUND 60% AM I ELLIGIBLE TI WRITE olimpids,bitsat,kvpy
 
vignesh one month ago
Sir/Madam/Friends, im preparing for JEE 2015.. my preparation has not been done that well... also as im trying to focus on IITJEE my school marks are becoming worser day by day.....im in a...
 
 
The issue is about time management. You have to know when to study more for school exams and more for IIT JEE preparations.IIT JEE requires a lot of hardwork and time whereas school exams...
  img
Aziz Alam 2 months ago
 
yeah i agree.. .
 
Akash 2 months ago
How do shift to cse in the second yr if I hav taken ee or etc in the first yr in an nit?
 
 
It is quite difficult to change branch after first year.. You have to be in top 10 of all the students in 1 st year to do so.. So you know it is quite difficult to do it.. Thanks &...
  img
bharat bajaj 4 months ago
Is there chances that Assersion Reasoning type questions will be asked in IIT JEE 2014?
 
 
yes, Generally there are 5 Assertion-Reason Type questions. Thanks & Regards Rinkoo Gupta AskIITians Faculty
  img
Rinkoo Gupta 6 months ago
 
5 from each subject?
 
Samrat 6 months ago
View all Questions »