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Monday, February 5, 2007
"ALGEBRA QUESTION OF THE DAY"
If r = (3p + q)/2 and s = p - q, for which of the following values of p would r2 = s2?
true whats R2 and S2 if its taken as 2R and 2S then it means its equal to r=s and in that case the value is -3q which matches a bit with option D except the negative sign. Hence question is wrong!
Answer is A: consider (R)square=(S)square...that is what is meant by R2=S2 solving the equation gives you (5p-q)(p+3q)=0 so p is either q/5 or -3q so answer is A as -3q is not given in the options...
wat do u mean by R2 n S2
ReplyDeletesame Q here...
ReplyDeleteif its jus r and s thn the answr is -3q
true whats R2 and S2
ReplyDeleteif its taken as 2R and 2S then it means its equal to r=s
and in that case the value is -3q which matches a bit with option D except the negative sign.
Hence question is wrong!
a
ReplyDeleter2(rsquare)=s2{s square)
r2-s2=0
(r+s)(r-s)=0
ie (5p-q/2)(p+3q/2)=0
implies p=q/5 or p=-3q
hence ans is A
ans is A no doubt abt it
ReplyDeletea is answer
ReplyDeleteanswer is d no doubt about it
ReplyDeleteAnswer is A:
ReplyDeleteconsider (R)square=(S)square...that is what is meant by R2=S2
solving the equation gives you
(5p-q)(p+3q)=0
so p is either q/5 or -3q
so answer is A as -3q is not given in the options...