Các câu hỏi tương tự
Tim cac gia tri cua m de tap nghiem cua phuong trinh x4 - 2(m-1)x2 -(m-3)=0 co
a, 4 phan tu
b, 3 phan tu
c, 2 phan tu
d, khong co phan tu nao (vo nghiem)
Cho phuong trinh \(ax^2+bx+1=0\) voi a,b la cac so huu ti.Tim a,b biet \(x=\frac{\sqrt{5}-\sqrt{3}}{\sqrt{5}+\sqrt{3}}\)la nghiem cua phuong trinh
tim m de phuong trinh sau co nghiem kep roi tim nghiem kep do
a) x^2 -mx-4=0
b)x^2 -2(m-4)x +m^2 +m +3 = 0
Cho phuong trinh : x2 +( 2m-1 )x +2(m-1) = 0
a) Giai phuong trinh khi m= 2
b) Chung minh phuong trinh co nghiem voi moi m
c) Tim m de phuong trinh co 2 nghiem x1 , x2 thoa man x1 ( x2 - 5 ) + x2 ( x1 - 5 ) = 33
Tim m de
m(m-3)x+m-3=0
a,co nghiem duy nhaat
b,vo nghiem
c,co vo so nghiem
a) Cho phuong trinh x2 +mx+1=0. Tim dieu kien cua m de phuong trinh co nghiem kep. Tinh nghiem kep do
b) Khong giai phuong trinh, chung to phuong trinh 2x2 - 3x - 5 = 0co 2 nghiem phan biet x1 , x2. Tinh ( x1 - x2 )
tim nghiem nguyen cua phuong trinh: \(\left(x^2+1\right)\sqrt{1-x}-\left(2x+x^3\right)\sqrt{x+1}=3x^4\sqrt{2x}\)
a) Giai phuong trinh sau: \(\sqrt{x}-\sqrt{x+1}-\sqrt{x+4}+\sqrt{x+9}=0\)
b) Tim so tu nhien x, y thoa man: x( 1 + x +x2) = 4y( y - 1)
tim m de pt vo nghiem : \(\sqrt{x^2-10x+m}=2-x\)