【题目】If the equation (x-a)2=b has real solutions, then the set of values that b can take is 相关知识点: 试题来源: 解析 【解析】 结果一 题目 10 Iftheequatin(x-a)^2=bhasrealsOlutin(x-y) then the set of values that b can take is 答案 10 b≥0...
be a constant. If the quadratic equation x2 ax a=1 has equal roots, then a=( ). 设a为一常数.若二次方程x2 ax a=1有等根,则a=( ).A. −1. B. 2. C. 0 or −4.0或−4. D. 0 or 4.0或4. 相关知识点: 试题来源: 解析...
If the equation in x, x^2+mx+n=0 , has two equal real roots, then a pair of real values ofm and n that satisfies the condition could be m =and n = 相关知识点: 试题来源: 解析 2 1 (can be any values of m and n aslong as they satisfy m2= 4n) ...
∵a+b=0,∴①当a=0时,b=0,此时0×x+0=0,x取任意实数,②当x≠0时,b=-a,ax+b=0,即为ax-a=0,解得x=1,此时方程有唯一解,综上所述,方程有唯一解或有无数解.故选C.
18 If the equation inx, x^2+mx+n=0 has two equal real roots, then a pair of real values ofm and n that satisfies the condition could bem =and n = 相关知识点: 试题来源: 解析 18 2 1 (can be any values of m and n aslon gastheysatisfym^2=4n) ...
8If the equation x2+(m-3)x-2m+2=0 has a root 0,then the value of its discriminant△=.8
If the equation of a surface S is z=f(x,y), where x^2+y^2≤ R^2 and you know that |f_x|≤ 1 and |f_y|≤ 1, what can you say about A(S)? 相关知识点: 试题来源: 解析 We have A(S)= _D√ (1+(f_x)^2+(f_y)^2). But if |f_x|≤q 1 and |f_y|...
百度试题 结果1 题目【题目】9 If the equation (m+2)x2+3mx-4m= 0 in terms of. is a linear equation in one variable,then the solution of the equation is 相关知识点: 试题来源: 解析 【解析】x=4/3
If a 2+b 2>0,then the equation ax+b=0 for x has( )only one rootno rootinfinite roots(无穷多个根)only one root or no root 答案 由ax+b=0可得x=-, ∵a 2+b 2>0, ∴a、b不会同时为0, 当a=0时,方程无解; 当a≠0时,方程有惟一的解x=-, 故选:D.相关...
.(英汉小字典:equation方程;infinite roots无数个根) 相关知识点: 试题来源: 解析 试题分析:先把m(x-1)=2001-n(x-2)进行化简,然后根据方程根的个数列出方程组,解出m、n的值,最后把m、n的值代入求出结果即可. 试题解析:m(x-1)=2001-n(x-2),mx-m=2001-nx+2n,mx+nx=2001+2n+m,m+n)x=...