1for the first one,
a + b + c+d = 15
ab + cd = 28
ac + bd = 28
ab = 16
Q: Given a,b,c and d ε R satisfying a+b=8 ; ab+c+d=23 ; ad+bc = 28 ; cd = 12 , Find
a) a+b+c+d
b) ab+cd
c) ac+bd
d) ab
(It's matrix type but I didn't wrote the options as it was taking more time)
Q: The no. of values of ' k ' for which the expression is a perfect square , (2x2-4(k-1)x+3) (x2+2kx+k+1)
I got 0?
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UP 0 DOWN 0 0 8
8 Answers
1for ur second question....there are 2 real values of k....bt 0 integral values...pls clarify if the question asks for integral values of k...
the 2 real values are....
"(2±√6)/2"
712nd one has 1. That I got later..
And for first one, I need a logical approach to solution. No Copy paste please. Cause I have a ridiculous one solution solution which completely not understandable to me
111) That's not enough rishabh, there is another answer to each of the 4 questions... I shall post my soln. if needed.
1could you please pst your method.
and also bhaiyya im prep for rmo this year. din write it last year..but tried the ppr @ home evn then got just 2.5 answers..please suggest me the material reqd. and do mail me any pdf/books you have regarding the same.
thanks.
71@Soumik Bhaiya.. Yes Please post a ' logical + genuine ' solution to the above problem.