Các câu hỏi tương tự
cho cac so thuc x,y,z thoa man 0<a<hoac=x,y,z < hoac=b . tim gia tri lon nhat cua bieu thuc
T= I ab-xy I / (x+y)x + I bc-yz I / (y+z)x + Ica-zxI / (z+x)y
ai lam duoc cau nay minh cong nhan la gioi
ho ba so x y z thoa man x + y +z =3. gia tri lon nhat cua bieu thuc p= xy +yz+ xz
tim gia tri nho nhat cua bieu thuc P=1/x^2+x+1/y^2+y+1/z^2+z
giai chi tiet giup minh may bai nay nha
1 gia tri x>0 thoa man
(2x-3)2=(x+5)2
2 gia tri lon nhat cua -3x2-6x-4
3 tim gia tri cua x+y biet
x-y=2 ; x*y=99 va y <0
4 nghiem cua phuong trinh
(2x-3)2-4x2-297=0
cho x,y,z la cac so thuc duong thoa man x+y+z=1 tim gia tri nho nhat cua bieu thuc M=1/16x+1/4y+1/z
cho x^2+y^2+z^2=3. tim gia tri nho nhat va lon nhat cua P=x+y+2z
cho x,y,z>0 va xyz=1 chung minh rang neu x+y+z>1/x+1/y+1/z thi trong 3 so co it nhat 1 so lon hon 1
giup minh giai bai toan ve hang dang thuc nha
a <x+y+z+d>mu2
b,<x+y-z-d>mu2
giup minh gai bai nay voi nha
a, <x+y+z+>mu 2
b , <x+y-z-d>mu 2