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 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!
cho x,y dương thoa man : x^2/9 + y^2/16 = 36. tim gia tri lon nhat cua p =x-y+2004
tim gia tri lon nhat cua P=2x+\(\sqrt{1-4x-x^2}\)
cho x ,y thoa man x+3y=2
tim gia tri lon nhat cua p=x2+y2
gia tri lon nhat cua bieu thuc P=can bac hai cua (3+2x-x^2)
Tim gia tri lon nhat va gia tri nho nhat cua bieu thuc sau: A=\(\frac{x+1}{x^2+x+1}\)
\(p=2x+\sqrt{1-x}\)voi 0<=x<=1. Tim gia tri lon nhat cua P
Tim gia tri nho nhat va lon nhat cua bieu thuc sau: \(p=\frac{4x+3}{x^2+1}\)
