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 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 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 la cac so thuc duong. Tim gia tri nho nhat cua bieu thuc:
\(P=\frac{xy}{x^2+y^2}+\left(\frac{1}{x}+\frac{1}{y}\right)\sqrt{2\left(x^2+y^2\right)}\)
cho x>y va xy=1000 tim gia tri nho nhat cua \(\frac{x^2+y^2}{x-y}\)
Cho x;y la hai so duong thay doi. Tim gia tri nho nhat cua bieu thuc:
S=(x+y)^2/x^2+y^2. + (x+y)^2/xy
Giai chi tiet giup mk nha!! Cam on!
tim gia tri nho nhat cua \(\frac{1}{1+xy}+\frac{1}{1+yz}+\frac{1}{1+xz}\)voi x;y;z>0 va x^2+y^2+z^2<=3
Cho 2 so duongx,y thoa man\(x\ge2y\) tim gia tri nho nhat cua phuong trinh \(P=\frac{2x^2+y^2-2xy}{xy}\)
Tim gia tri lon nhat va gia tri nho nhat cua bieu thuc sau: A=\(\frac{x+1}{x^2+x+1}\)
