cho x ,y thoa man x+3y=2
tim gia tri lon nhat cua p=x2+y2
cho ham so y=2x^2-3x+1. gia tri lon nhat cua x thoa man f(-x)=f(2x) la x=?
1 tim gia tri lon nhat cua (x+z)(y+t) biet x^2+y^z^2+t^2=1
2 tim gia tri lon nhat cua (x+z)(y+t) biet x^2+y^2+2z^2+2t^2=1
Cho cac so thuc x , y thay doi thoa man x + y = 2 . Tim gia tri nho nhat cua bieu thuc P = ( x4 + 1 )(y4 + 1) + 2013
cho ham so y=2x^2-3X+1,gia tri lon nhat x thoa man f(-x)=f(2x) la x=?
help me!!!
Cho he phuong trinh sau:
\(\hept{\begin{cases}\left(m+1\right)x+my=2m-1\\mx-y=m^2-2\end{cases}}\)
Tim m de he phuong trinh co nghiem duy nhat (x;y) thoa man P= xy dat gia tri lon nhat.
cho x,y la cac so duong thay doi va thoa man dieu kien x+y\(\le\)1. tim gia tri nho nhat cua bieu thuc M=\(\frac{1}{x^2+y^2}+\frac{1}{xy}+4xy\)
Cho hai so Thưc duong x, y thoa man x>=2y.Tim gia tri nho nhat cua bieu thuc P=(2x^2+y^2-2xy):xy
cho x;y;z duong thoa man xyz=1
tim gia tri nho nhat cua \(\frac{1}{x^2\left(y+z\right)}+\frac{1}{y^2\left(x+z\right)}+\frac{1}{z^2\left(x+y\right)}\)
