.(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...
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...
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 ...
一道英文数学题If x,y and z are positive numbers such that x+y-5z=0 and x-y+z=0,then the value of x^2-y^2/z^2-x^2 is
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...
AStatement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
【GRE真题答案解析】GRE考满分为考生准备GRE 数学QR真题答案解析,If x, y, and z are positive numbers such that 3x
If x and y are positive integers and (2x +y) is even, which of the following must be even ? Ax3+2xy2 B3x2+2y C4x2+x+y2 D5x2+x+y3Submit Question 3 - Select One If distinct numbers x,y,zandp are chosen from the numbers -2, 2, 1/2, -1/3, what is the largest possible...
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...
If x,y,z are three real numbers of the same sign, then the value of (xy+yz+zx) lies in the interval ___ Video Solution Text SolutionGenerated By DoubtnutGPT The correct Answer is:5 To solve the problem, we need to find the value of the expression xy+yz+zx given that x,y,z ar...