Các câu hỏi tương tự
giup minh vs......
1.Tim tat ca cac so nguyen n ( lnl <1000) sao cho can(3n^2 +789) la mot scphuong chia het cho 3.
2. Biet rang x la mot so thuc khac 0, tim gtnn cua bieu thuc: Q = ( 2011,2012x^2 -2x +2013,2014)/(2014,2015x^2)
Tim GTLN ,GTNN cua bieu thuc :A=\(\frac{x+1}{x^2+x+1}\)
tim GTNN cua bieu thuc :
\(x^2-4\sqrt{x}-7\)
\(\frac{2017-2015x}{\sqrt{1-x^2}}\)
tim GTNN cua bieu thuc tren
TIm GTNN cua bieu thuc
\(x^2-4x+3\)
Tim mi va max cua bieu thuc A=( x^2 - 2x+2)/(x^2 + 2x+2)
Cho bieu thuc: \(p=\left(\frac{1}{\sqrt{x}-\sqrt{x-1}}-\frac{x-3}{\sqrt{x-1}-\sqrt{2}}\right)\left(\frac{2}{\sqrt{2}-\sqrt{x}}-\frac{\sqrt{x}+\sqrt{2}}{\sqrt{2x}-x}\right)\)
a) Tim DKXD cua bieu thuc p
b) Rut gon bieu thuc p
TIM GTNN cua bieu thuc
2x-\(3\sqrt{x}\)+4
\(M=\left(\frac{\sqrt{x}+2}{x+2\sqrt{x}+1}-\frac{\sqrt{x}-2}{x-1}\right)N=\frac{\sqrt{x}+1}{\sqrt{x}}\) voi x>0 va x khac 1
a) tim gia tri bieu thuc cua N khi x = 25
b) rut gon S = M.N
c) tim m de S<-1