Các câu hỏi tương tự
cho x,y la 2 so thuc duong thoa man \(x^2+y^2=4\) tim max P=\(\frac{xy}{x+y+2}\)
a)Tim cap (x,y) nguyen duong thoa man xy=3(y-x)
b)cho 2 so x,y >0 thoa man x+y = 1
Tim GTNN cua M=(x^2+1/y^2)(y^2+1/x^2)
Cho x,y la hai so thuc thoa man x+y=2.Tim gtln cua bt M=x2y2(x2+y2) - HELP ME-
Cho 2 so thuc duong x,y thoa man: x+y =1. Tim GTLN cua: P=( x2 + y2) (1/x2+1/y2)
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cho cac so x,y thoa man:x2+y2=16+xy. tim min;max cua P=x2+y2
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 x,y,z la cac so thuc duong thoa man x+y+z=1 tim min A=x^3/(x^2+xy+y^2)+y^3/(y^2+yz+z^2)+z^3/(z^2+zx+x^2)
cho cac so thuc duing x,y thoa man x+y<=3.Tim GTNN cua bieu thuc : P=1/5xy + 5/x+2y+5