tham khảo: https://hoidap247.com/cau-hoi/1025167
tham khảo: https://hoidap247.com/cau-hoi/1025167
cho x/y+z+t=y/z+t+x=z/t+x+y=t/x+y+z
chung minh bieu thuc sau co gia tri nguyen
p=(x+y/z+t)+(y+z/t+x)+(z+t/x+y)+(t+x/y+z)
cho x/y+z+t=y/z+t+x=z/t+x+y=t/x+y+z cmr bieu thuc sau co gia tri nguyen P=(x+y/z+t)+(y+z/t+x)+(z+t/x+y)=(t+x/y+z)
cho x/(y+z+t)=y/(z+t+x)=z/(t+x+y)=t/(x+y+z)
cmr bieu thuc sau co gia tri nguyen
P=(x+y)/(z+t)+(y+z)/(t+x)+(z+t)/(x+y)+(t+x)/(y+z)
cho x,y,z la cac so nguyen duong va x+y+z la so le, cac so thuc a,b,c thoa man (a-b)/x=(b-c)/y=(a-c)/z. chung minh rang a=b=c
cho a,b,c,x,y,z la cac so nguyen duong thoa man a^x=bc;b^y=ac;c^z=ab. chung minh xyz-x-y-z=2
cho cac so
x/y+z+t=y/x+z+t=z/x+y+t=t/x+y+z
tính :A=x+y/x+t + y+z/x+t + z+t/x+y + t+x/z+y
cho x/y+z+t=y/z+t+x=z/t+x+y=t/x+y+z Chứng minh rằng biểu thức sau có giá trị nguyên: A=(x+y/z+t)+(y+z/t+x)+(z+t/x+y)+(t+x/y+z)
Cho x ; y ; z ; t : CM : \(M=\frac{x}{x+y+z}+\frac{y}{x+y+t}+\frac{z}{y+z+t}+\frac{t}{x+z+t}\)co gia tri khong phai la so tu nhien
Cho x/y+z+t=y/z+t+x=z/t+x+y=t/x+y+z. Chứng minh rằng: biểu thức sau có giá trị nguyên: A=x+
y/z+t + y+z/t+x + z+t/x+y + t+x/y+z