Tim GTNN GTLN voi x thuoc Z A=\(\frac{2014-x}{x-2015}\)
tim x thuoc Z de A thuoc Z va tim gia tri do A=\(\frac{1-2x}{x+3}\)
Tim GTNN cua bieu thuc
A=6/ /x/ - 3 ( x thuoc Z)
cho ham so y=f(x)=27-2x/12-x. tim gia tri nguyen cua x de f(x) co GTLN, GTNN
Tim gia tri nho nhat cua bieu thuc \(Q=\frac{27-2x}{12-x}\)
tim x;y thuoc z de bt sau nhan GTNN
B=\(\frac{4x-5}{4x+3}\)
tim cap so nguyen x,y
x+y+xy=2
b, tim gtln cua bieu thuc
q=\(\frac{27-2x}{12-x}\)(x nguyen)
tim x thuoc Z biet : 2x+\(\frac{1}{7}=\frac{1}{y}\)
b1: cho\(\frac{a}{2b}\)=\(\frac{b}{2c}=\frac{c}{2d}=\frac{d}{2a}\)
tinhính A=\(\frac{2011a-2010b}{c+d}\)+ \(\frac{2011b-2010c}{a+b}\)+\(\frac{2011c-2010d}{a+b}\)+\(\frac{2011d+2010a}{b+c}\)
bai2 a, Tim (x,y) thuoc Z biet x+y+xy=2
b, tim Max Q=\(\frac{27-x}{12-x}\)(x thuoc Z)
