[讨论]一道不是GWD的最近真题

mingzhu11

Q29.

if X>land Y>l,is X<Y?

(1) X^2/(XY+X)<1

(2) XY/Y^2-Y<1

Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient

● Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient

● BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE

is sufficient.

● EACH statement ALONE is sufficient

● Statements (1) and (2) TOGETHER are NOT sufficient

答案给的是E,但我认为应该是B. 各位NN能否给个答案?

mingzhu11

谢谢楼上两位！！

renprince

我也觉得是B

A只能确定X<Y+1 不能确定X<Y

因为X.Y不一定是整数 所以可以是Y<X(=Y+0.5)<Y+1

B的话可以推出X<Y-1 因为XY都为正数 所以X<Y-1<Y

有没有牛牛可以帮忙解答

mjiirggh

选Ｄ，（１）Ｘ＜Ｙ＋１，（２）能推出Ｘ＜Ｙ＋Ｙ平方，则两个都能推出Ｘ＜Ｙ