.(positive numbers:正数;the value:值) 相关知识点: 试题来源: 解析 分析: 根据2x 2 -6y 2 +z 2 =0,6x 2 -2y 2 -z 2 =0,x,y,z是正数,?x=y,z=2y,代入所求分式即可得出答案. 解答: 解:由x,y,z是正数,2x 2 -6y 2 +z 2 =0,6x 2 -2y 2 -z 2 =0, 两式相加得出x=y, 把x...
结果1 题目 If x, y and z are positive numbers and the sum of x and y is equal to the square of z, which of the following is equivalent to z? () A. √x+√y B. √(x+y) C. √(x^2+y^2 ) D. x^2+y^2 E. (x+y)^2 相关知识点: 试题来源: 解析 B 反馈 ...
If x,y and z are positive numbers such that 2x2-6y2+z2=0,6x2-2y2-z2=0,then the value of x2-xz+z2 x2+yz+y2 is___. (positive numbers:正数;the value:值) 试题答案 在线课程 由x,y,z是正数,2x2-6y2+z2=0,6x2-2y2-z2=0, 两式...
If x, y, and z are positive numbers such that 3x<2y<4z , which of the following statements could be true? Indicate all such statements.A.x=y B.y=z C.y>z D.x>z 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 ...
If x,y, and z are positive real numbers different from 1 andx18=y21=z28show that3,3logyx,3logzy,7logxzare in A.P. View Solution Ifx,y,zare distinct positive real numbers is A.P. then1√x+√y,1√z+√x,1√y+√zare in ...
Ifx,y, andzare positive numbers, what is the value of the average (arithmetic mean) ofxandz? x−y=y−z x2−y2=z 选项: 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 suff...
Gmat - DI逐题精讲 - DS - If x and y are positive numbers, is the fraction with nume, 视频播放量 3、弹幕量 0、点赞数 0、投硬币枚数 0、收藏人数 0、转发人数 0, 视频作者 Miller的Gmat工作室官方, 作者简介 只教gmat的工作室创始人,备考+vx miller_1993,接线上1v1
If X,Y and Z are opositive number such that Y and Z have respectively 1 and 0 at their unit's place and Δ=∣∣∣∣X41Y01Z10∣∣∣∣ If (Δ+1) is divisible by 10 then X has at its unit's place A 1 B 0 C 2 D none of these...
If x, y and z are non - zero numbers such that x y≤1 and xy=z, which of the following can be true?①yz;②y=z;③z=x;④xz;⑤x0 . 相关知识点: 试题来源: 解析 如果x,y,z都是非零实数,且xy≤1, xy=z,则下面选项可能成立的有 ①yz; ②y =z;③z=x; ④x z; ⑤x 0...
Statement Ⅰ must be true, because if all three variables are positive integers and x2=z2 plus the square of another positive integer, then x has to be greater than z;, plug in numbers to verify. Ⅲ must be true because the square of a positive integer is always a positive integer, ...