Violympic toán 9
Các câu hỏi tương tự
tim tat ca cac nghiem nguyen cua phuong trinh :
\(x^2y^2-2x\left(y+2\right)+4=0\)
Cho he phuong trinh
\(\left(a+1\right)x-ay=5\) (1)
\(x+ay=a^2+4a\) (2)
Tim gia tri cua a thuoc Z sao cho he phuong trinh co nghiem (x;y) voi x, y thuoc Z
cho cac phuong trinh x^2 +(2m-1)x+m^2-2m=0
tim m de phuong trinh co hai nghiem trai dau
Cho 3 so x, y, z thoa man cac he thuc: \(\left(z-1\right)x-y=1\) va \(x+zy=2\)
Chmr: \(\left(2x-y\right)\left(z^2-z+1\right)=7\) va tim tat ca cac so nguyen x, y, z thoa man cac he thuc tren.
goi \(x_1,x_2\) la cac nghiem cua phuong trinh :
12\(x^2-6mx+m^2-4+\dfrac{12}{m^2}=0\left(m>0\right)\)
Tim m de A=\(x_1^3+x_2^3\) dat gia tri lon nhat , gia tri nho nhat
cong thuc nghiem tong quat cua phuong trinh x+2y=0
chp phuong trinh bac hai \(x^2-4x+4m-m^2=0\)
a/chung minh phuong trinh luon co nghiem voi moi gia tri cua m
b/ goi \(x_1,x_2\) la nghiem cua phuong trinh da cho . Hay tinh gia tri cua m sao cho \(x_2=x_1^2-5x_1\)
\(\left\{{}\begin{matrix}2x-y=7\\x+4y=-1\end{matrix}\right.\)
tìm giá trị nguyên cua m de 2 duong thang bieu dien tap nghiem cua 2 phuong trinh trong he cat nhautai 1 diem nam trong goc phan tu thu 2 cua mat phang toa do
1. Tim nghiem nguyen cua pt:
\(\sqrt{9x^2+16x+96}=3x-16y-24\)
2. Tim nghiem nguyen duong:
\(2+\sqrt{x+\frac{1}{4}+\sqrt{x+\frac{1}{4}}}=4\)