Absolute value

[jfranco23]

If xy + z = z, is /x-y/>0?

1. x not equal 0
2. y = 0

[earth@work]

is the OA- A

xy + z = z means xy=0 i.e either x=0 or y=0 or both equal to 0

1. x not equal 0 this implies y=0 ==> lx-0l>0 for all x not equal to zero ... sufficient

2. y=0; means either x=0 or x not equal to 0
case 1..if x=0 then lx-yl is not greater than 0
case 2...if x not equal to 0 then lx-yl >0 ..... two contradictory answers...so 2 is insufficient
ans:A

[x2suresh]

is the OA- A

xy + z = z means xy=0 i.e either x=0 or y=0 or both equal to 0

1. x not equal 0 this implies y=0 ==> lx-0l>0 for all x not equal to zero ... sufficient

2. y=0; means either x=0 or x not equal to 0
case 1..if x=0 then lx-yl is not greater than 0
case 2...if x not equal to 0 then lx-yl >0 ..... two contradictory answers...so 2 is insufficient
ans:A

agree with your logic

[Bidisha_800]

(A)