一道GMAT数学题求解.If y≠3 and 3x/y is a prime integer greater than 2,which of the following must be true?1.x=y2.y=13.x and y are prime integers.A NoneB 1 onlyC 2 onlyD 3 onlyE 1 and 3答案给出的是A,我觉得选B,请问条件1有什
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一道GMAT数学题求解.
If y≠3 and 3x/y is a prime integer greater than 2,which of the following must be true?
1.x=y
2.y=1
3.x and y are prime integers.
A None
B 1 only
C 2 only
D 3 only
E 1 and 3
答案给出的是A,我觉得选B,请问条件1有什么问题?
3x/y 是质数且为整数,但不一定x/y是整数啊
比如 3x/y=7,7大于2 且为质数,但x/y不等于1啊
我觉得是题目的问法比较绕一点,他问的是一定对的(must be true).
题呢 ~~~~
题呢?
3x/y是大于2的质数,可以是3、5、7都行的,所以1不一定对
一道GMAT数学题求解.If y≠3 and 3x/y is a prime integer greater than 2,which of the following must be true?1.x=y2.y=13.x and y are prime integers.A NoneB 1 onlyC 2 onlyD 3 onlyE 1 and 3答案给出的是A,我觉得选B,请问条件1有什
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