GRE数学题 If x and y are integers and x>y>0If x and y are integers and x>y>0,how many integers are there between ,but not including,x and x-y-1 答案 题目:xy是整数,并且x>y>0,有多少个不包括xy在内的整数在xy之间.我觉得用直接代数求就行,比如x是5,y是2,然后选符合的那个选项...
所以这两个数之间自然就是有x-y+1-2=x-y-1个数了 方便理解的话，可以把x和y用具体数字带入 比如x=3，y=1 从x到y一共有3个数，两个数之间有1个数
21.If x and y are integers and xy+x^2 is odd,which of the following statements must be true?① x is odd② y is odd③ x+y is oddA.①B.③C.① and ②D.① and ③E.② and ③2.For how many integers n is (2n+1)(3n-1) a negative number?A.NoneB.OneC.TwoD.ThreeE.Fou...
If x and y are integers and x>y>0,how many integers are there between ,but not including,x and x-y-1 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析解答一 举报题目:xy是整数,并且x>y>0,有多少个不包括xy在内的整数在xy之间.我觉得用直接代数求就行,比如x是5,y是2,然后选符合的...
Data Sufficiency 试题详情 题目: If x and y are integers and x > 0, is y > 0? (1) 7x – 2y > 0 (2) -y < x fici 选项: 答案: E
题目内容 收藏 纠错 x and y are integers and xy<0. Quantity A:Quantity B:0 AQuantity A is greater. BQuantity B is greater. C The two quantities are equal. DThe relationship cannot be determined from the information given. 显示答案 登录后才可以添加做题笔记哦,还没有账号? 马上注册...
若x、y均为整数且xy−x+y=6,求x+y的最大值.If x and y are integers and xy−x+y=6, the largest value of
且x是y的倍数的y有无穷多个,此时y既可以等于2,也可以不等于2;根据(2)可设x+2=ny,由x是y的倍数可设x=my,其中m和n都是正整数,把这两个式子相减可得(n-m)y=2,因为n-m和y都是正整数,所以当n-m取1时,y取2,当n-m取2时,y取1,因此(2)也不充分;根据以上分析可知(1)+(2)时,y=2,所以(1...
If x and y are integers and xy2 is a positive odd integer, which of the following must be true? Axy is positive. Bxy is odd. Cx + y is even. 显示答案 登录后才可以添加做题笔记哦,还没有账号? 马上注册 KMF 解析 网友解析 题目数据 收起 暂无解析 以上解析由 考满分老师提供。 题...
If x and y are integers and x > 0, is y > 0? (1) 7x – 2y > 0 (2) -y < x 选项: 答案: E 提问列表 提问 提问: 为什么联立不行呢? If x and y are integers and x>0, is y>0? (1)7x-2y>0 (2)-y解答:点赞0 阅读398 解答: sysadmin 提问: 为什么...