(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
Hey, I am from Bangalore, I am in a bad situation now, the problem is have just done my 10 std in 2010, and I quit school for good reasons. Now I have decieded to resume my sudies and do my...
 
 
For JEE 2014 the eligibility criteria for admission, in context of age was: Born on or after 1 st October 1989 . So for JEE 2015 you can have the idea about the exact date, i.e., Born on or...
  img
Aziz Alam 3 months ago
==>I wanted to know that if i am allotted any seat in third round of counselling which I am not eager to take and do not accept admission in JOCSAP, then, WOULD I BE DECLARED INELIGIBLE FOR...
 
 
You passed 10+2 examination in 2014 and also qualified in JEE (Advanced) - 2014. You appeared for counselling for JEE (Advanced) - 2014 and was offered admission in one of the IITs/ISM,...
  img
Aziz Alam 3 months ago
is 10 matks required for iit jee exams or jee mains?
 
 
Year of passing of class 12 th makes the difference not 10 th . You have two chances, the year you appear for 12 th and year later....
  img
Aziz Alam 9 days ago
 
  img
Aziz Alam 11 days ago
 
sir i have appered for my 10 in 2013 but fue to some reasons i discontinued this year and now im gona write my iit exam in 2016 will it make any difference
 
vignesh 9 days ago
sir, when i login to jeeadv to know the seat alloted to me will i have to pay right then or can i login again to pay the fee pls tell
 
 
Hello student, You can login logout then can pay later, but you have to keep in mind the real deadline, try to pay and fill your choices much before the actual deadline.
  img
Sher Mohammad 3 months ago
Is there negetive marking in AIEEE exam.
 
 
Dear Shruti, There will be objective type questions with four options having single correct answer. For each incorrect response one fourth (1/4) of the total marks allotted to the question...
 
Rohith Gandhi 4 years ago
Where can I get AIIMS 2014 solutions?
 
 
You may get aiims 2014 solutions at aakash insitute official site .. Thanks Bharat Bajaj Askiitians faculty
  img
bharat bajaj 4 months ago
View all Questions »