Voi x>=-2.Tim GTNN cua bieu thuc N=x^2+2x+1/(x+2)
Giup minh voi : cho P= \(\sqrt{x-1}\)+\(\sqrt{3-x}\)Tim GTLN,GTNN cua P
Tim GTNN cua
\(A=x^2-\frac{1}{3}x+\frac{1}{27x}+2016...\)
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)
tim min cua bieu thuc
3/(3-x) + 12/(x+1) voi -1<x<3
Rút gọn C=\(\frac{1}{3-2\sqrt{x}}\)
tim GTNN của c phay voi c =\(\frac{1}{C}.\frac{1}{\sqrt{x}+1}\)
Tinh C voi x=\(\frac{2}{2-\sqrt{3}}\)
1.Giải`phương trình:\(x^2-10x+27=\sqrt{6-x}+\sqrt{x-2},\)
2.Tim GTLN,GTNN cua \(A=\frac{x+1}{x^2+x+1}\)
3.Tim m de 3 duong thang dong quy :
\(d_1:y=x-4;d_2:y=2x-1;d_3:y=mx+2\)
Tim nghiem tu nien cua pt :2y=1+x+x2+x3
cac ban giup voi
tim gtln va gtnn cua x/(x^2+1)