帮着看看这两道题 谢谢啦

云香113

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.
If x and y are positive, is 3x > 7y?

(1)x > y + 4

(2)-5x < -14y


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.




If x and y are positive, is 3x > 7y?

(1)x > y + 4

(2)-5x < -14y


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.

cindyzhizhi

第一题  条件1   移项   2X>y   同乘2   4x>2y  推不出      条件2   推不出   条件1+2也推不出  选E
第二题  条件1  推不出     条件2   5x>14y    2.5X>7y   那3X>7y成立   选B
不知想的对不对

云香113

谢谢啦~~~