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 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 3 so thuc abc khac 0 va mot doi so khac nhau thoa man 

a² . ( b+ c ) = b² . ( a + c ) = 2018 

Tinh gia tri bieu thuc H = c² . ( a+b)

Cho 3 so  a,b,c khac 0 va doi mot khac nhau thoa man  a^2.(b+c)=b^2.(a+c)=2015 Tinh c^2.(a+b)

cho a,b,c khac nhau doi mot va 1/a+1/b+1/c=0.rut gon cac bieu thuc

N=bc/a^2+2bc+CA/B^2+2AC+AB/C^2+2AB

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)

cho 3 so a,b,c khac thuoc Q khac nhau tung doi mot va khac 0 thoa man a/b+c=b/a+c=c/a+b

Chung minh b+c/a+a+c/b+a+b/c khong phu thuoc vao cac gia tri cua a,b,c

cho a,b,c,d la cac so nguyen duong doi 1 khac nhau thoa man a/a+b  +   b/b+c   +  c/c+d  + d/d+a   =2

CMR abcd la 1 so chinh phuong

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