anyone can help on this?
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1 alone is not sufficent
2 alone says they ether both positive or both negative
lets continue with 2
in the case they are both negative:
x<y
lets take x=-4 , y= -3.5
if we put it on the (1) we get x=0.5+y --> -4 = 0.5 - 3.5 --> -4 = -3
so it can't be made.
if both positive (1) is solve able
hence they are both positive and (c) is right
2 alone says they ether both positive or both negative
lets continue with 2
in the case they are both negative:
x<y
lets take x=-4 , y= -3.5
if we put it on the (1) we get x=0.5+y --> -4 = 0.5 - 3.5 --> -4 = -3
so it can't be made.
if both positive (1) is solve able
hence they are both positive and (c) is right
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2(x-y) = 1
==> x-y = 1/2
Not sufficient.
x Positive y positive Ex 3/4 , 1/4
x Positive y negative Ex 1/4 , -1/4
x negative y negative Ex -1/4 , -3/4
x/y > 1 2 alone is not sufficient.
Consider 1 and 2.
x/y > 1 only when x and y are positive.
C is the Answer.
Thanks
raama
==> x-y = 1/2
Not sufficient.
x Positive y positive Ex 3/4 , 1/4
x Positive y negative Ex 1/4 , -1/4
x negative y negative Ex -1/4 , -3/4
x/y > 1 2 alone is not sufficient.
Consider 1 and 2.
x/y > 1 only when x and y are positive.
C is the Answer.
Thanks
raama