My Points: 315
Total Posts Answered:295
Answer Details:
Feb 20, 2012 08:57 AM
The answer is A=10 , B=63
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My Points: 28
Total Posts Answered:8
Answer Details:
Feb 20, 2012 11:50 AM
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;
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My Points: 27
Total Posts Answered:7
Answer Details:
Feb 20, 2012 06:11 PM
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
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