标题: 求教数学一题GWD-1-Q3 [打印本页] 作者: kudoucliff 时间: 2010-7-26 12:04 标题: 求教数学一题GWD-1-Q3 If x and y are positive, is 4x > 3y? (1)x > y - x (2)x/y < 1
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. D. EACH statement ALONE is sufficient. E. Statements (1) and (2) TOGETHER are NOT sufficient. 答案是E，难道x/y<1不能推出x<y, 所以4x<3y吗……作者: kudoucliff 时间: 2010-7-26 12:05
对不起……我脑残勒……作者: kudoucliff 时间: 2010-7-26 12:08
确实不能……作者: catherine9119 时间: 2010-7-26 12:09
lz只能推出4x<4y ， 而4x是否小于3y推不出啊。。。作者: kudoucliff 时间: 2010-7-26 13:00
啊……要是在考场上脑残了怎么办……