Các câu hỏi tương tự
Tim gtln cua ab biet 3a+5b=12
cho a+b+ab=3.tim gtnn cua m=a^2+b^2
giai nhanh giup mik nhe:(
cho cac so duong a,b,c thoa man : ab+a+b=3
tim GTNN cua bieu thuc C=a^2+b^2
Cho a,b>0,a+b=1.Tim GTNN cua A=\(\frac{3}{a^2+b^2}+\frac{2}{ab}\)
Cho x+y=z=3;\(A=x^2+y^2+z^2;B=xy+yz+xz\) a) C/M:\(A\ge B\) b) tim GTNN cua A c)tim GTLN cua B d) timf GTNN cua A+B
cho a,b,c la cac so thoa man (a+1)^2+(b+2)^2+(c+3)2<2010.tim GTNN cua bieu thuc A=ab+b(c-1)+c(a-2)
Cho 2 so thuc duong a,b thoa man a+b<=1.Tim GTNN cua
\(A=\frac{1}{a^3+b^3}+\frac{1}{a^2b}+\frac{1}{ab^2}\)
tim gtnn cua A=7 / 10x -x^2 + 3
tim GTNN cua A= x^2-3/(x-2)^2