111If a is a root of the equation x2-x-1=0,find the value of the algebraic expression a-2a+3.①If ais a root of the equation x2-x-1=0, find the value of the algebraic expression a3- 2a+3. 211If a is a root of the equation x2-x-1=0,find the value of the 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．
111If the equation (k+1)x2-2x+3=0 in x has two real roots,then the set of value that k cantake is1 D If the equation (k+1)x2-2x+3=0 inxhas two real roots, then the set of value thatk can take is__ 21 D If the equation (k+1)x2-2x+3=0 inxhas two real...
Reason: If a,b,c are not all real, then equation ax2+bx+c=0 can have one real root and one one root imaginary. Q. If the equation ax2+bx+6=0 does not have two distinct real roots, then the least value of 3a+b Q. Statement 1 : If f(x)=ax2+bx+c, where a>0...
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 B x2+ax+a=1 x2+ax+a−1=0 Since it has equal ...
Step by step video & image solution for If the equation 2x^2-3xy-py^2 +x+qy-1=0\ (p, q in I) represents two mutually perpendicular lines, then (A) p^2+q^2=13 (B) p-q=5 (C) p^2-q^2=1 (D) p+q=5 by Maths experts to help you in doubts & scoring excellent marks...
JEAN WESTMOORE
If alpha1, alpha2 be the roots of the equation x^2-px+1=0 and beta1,beta2 be those of equatiion x^2-qx+1=0 and vecu=alpha1hati+alpha2hatj,and vecv=beta1hati+b
Let α and β be the roots of the equation x2−2018x+1=0. If βα andαβ are the roots of the equation x2−Sx+1=0, find the value of S. 设方程x2−2018x+1=0的根为α和β.若βα和aβ是方程x2−Sx+1=0的根,求S的值. 相关知识点: 试题来源: 解析 4073322. ...
Prove: For all integers a and b, if a \neq 0, the equation ax + b has a rational solution. How to prove that a number is transcendental? What the word "whole" and "irrational" means in calculus? Consider the real number r = a + b sqrt2 where a and b are rational numbers. Pr...