cho a,b,c la 3 so thuc duong thoa man dieu kien (a+b-c)/c=(b+c-a)/a=(c+a-b)/b tinh gia tri bieu thuc B=(1+b/a)*(1+a/c)*(1+c/b)

Cho a,b,c la ba so thuc duong thoa man (a^2).(b+c)=(b^2).(a+c)=20172018.tinh (c^2).(a+b)

cho a,b,c la ba so thuc khac nhau doi mot thoa man a^2(b+c)=b^2(a+c)=2015.Tinh c^2(a+b)

cho cac so thuc a,b,c la cac so thuc thoa man a+1/b=b+1/c=c+1/a CMR a=b=c

Cho cac so thuc phan a,b,c khac nhau doi mot va thoa man a^2-b=b^2-c=c^2-a . CMR (a+b+1)()b+c+1(c+a+1)=-1- de hsg tinh mon toan 9 nam 2012

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 a,b,c la 3 so thuc thoa man dk: a^2=(b-c)^2+2 va a^2= (b+c)^2-6.

tinh gia tri cua bieu thuc A=4a^2b^2-(a^2+b^2-c^2)^2

cho a,b,c la 3 so thuc doi mot khac nhau va khac khong, thoa man: a+1/b=b+1/c=c+1/a. hay chung minh rang abc=1 hoac abc=-1

cho cac so thuc a, b,c khac 0 thoa man a^2*(a+b)=b^2*(b+c)=2016. tinh bieu thuc A=c^2*(a+c)