Let p and q be roots of the equations x2 – 2x + A = 0 and let r and s be the roots of the equation x2 – 18 + B = 0. If p < q < r < s are in arithmetic progression the A = ………….. and B = ………… 

2 years ago

Share

Answers : (3)

                    

The answer is A=10 , B=63 

2 years ago
                    

 here let p=a,q=a+r,r=a+2r,s=a+3r;


 then here p+q=2            =>2a+r=2


         also r+s=18           =>2a+5r=18


 solving we get r=4,a=-1;


p=-1, q=3, r=7, s=11


A=pq= -3, B=rs = 77;

2 years ago
                    

I USE PUT & CHECK FORMULA IN THIS QUESTION.


P + Q = 2 , PQ=A ..............(1)


R + S = 18 , RS = B ...............(2)


-1,3,7,11 ARE IN A.P. SATISFYING THE RELATIONS (1) & (2)


SO , P=-1, Q=3 , R=7, S=11


SO, PQ= -3 = A


      RS= 77 = B 

2 years ago

Post Your Answer

More Questions On Discuss with colleagues and IITians

Ask Experts

Have any Question? Ask Experts
Post Question
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details
sir should I do bansal materials first or arihant jee ad and mains?
 
 
Go for Bansal materials first. It’s designed in a way to develop the concepts slowly and gradually take you to JEE Advanced level. Thanks &Regards Aziz Alam IIT Roorkee askIITians...
  img
Aziz Alam 19 days ago
 
go with askiitians material it prepared by iitians and you can ask direct doubts with askiitians team, i thingk going with arithant jee is a good idea.
  img
Sher Mohammad 14 days ago
sir is there any difference between potential and potential energy?
 
 
In simple language when potential is multiplied by mass we get potential energy.
 
Drake 25 days ago
Which books are the best for MCQ solving for Maths JEE( Mains) ?
 
 
O.P.Juneja and Tata McGraw Hill are very good as far as MCQ in Maths are concerned. Thaks & Regards Aziz Alam IIT Roorkee askIITians
  img
Aziz Alam 15 days ago
Will it be sufficient if we are thorough with ONLY NCERT textbooks for exams like aiims, aipmt ,manial,etc ?
 
 
Hi Sushmitha NCERT books act as basic foundation for the preparation of Medical entrance exams. So, never ignore that. One should have a thorough comprehension of the material given in...
  img
Sumreet Johar 22 days ago
 
Hi Sushmitha NCERT books act as basic foundation for the preparation of Medical entrance exams. So, never ignore that. One should have a thorough comprehension of the material given in...
 
Sumreet Singh Johar 27 days ago
sir , i want to know the priority of the following colleges along with the branches mentioned: (1)SGSITS INDORE WITH IPE (2)UIET CHANDIGAR WITH MECH. (3)PEC CHANDIGAR WITH IPE (4)YMCA...
 
 
With the data acqired from resources and data tabulation you can consider the colleges to be in the order PEC CHANDIGARH SGSITS INDORE YMCA FARIDABAD UIET CHANDIGARH
  img
Sourabh Singh 23 days ago
View all Questions »