Các câu hỏi tương tự
Cho x,y,z khac o va x-y-z=0.Tinh gia tri cua bieu thuc A=(1-z/x)(1-x/y)(1+y/Z)
Cho x,y,z khác 0 và x-y-z=0 . tinh gia tri cua bieu thuc \(\left(1-\frac{z}{x}\right)\left(1-\frac{x}{y}\right)\left(1+\frac{y}{z}\right)\)
cho xyz la cac so thuc thoa man y+z+1/x=x+z+2/y=x+y+2/z=1/x+y+z tinh gia tri bieu thuc A=2016.x+y^2017+z^2017
Cho x.y.z khac 0 va x+y+z=0.Tính giá trị biểu thuc
A=(1+ x/y)(1+ y/z)(1+z/x)
Cho x/a =y/b =z/c va a b c x y z khac 0 rut gon bieu thuc b = ( a^2x + b^2y + c^2z ) / x^3 +y^3+z^3
1) A frac{frac{3}{4}-frac{3}{11}+frac{3}{13}}{frac{5}{7}-frac{5}{11}+frac{5}{13}}+frac{frac{1}{2}-frac{1}{3}+frac{1}{4}}{frac{5}{4}-frac{5}{6}+frac{5}{8}}b) Cho 3 so x,y,z la 3 so khac 0 thoa man dieu kien :frac{y+z-x}{x}frac{z+x-y}{y}frac{x+y-z}{z}Hay tinh gia tri bieu thuc:Bleft(1+frac{x}{y}right)left(1+frac{y}{z}right)left(1+frac{z}{x}right)
Đọc tiếp
1) A= \(\frac{\frac{3}{4}-\frac{3}{11}+\frac{3}{13}}{\frac{5}{7}-\frac{5}{11}+\frac{5}{13}}+\frac{\frac{1}{2}-\frac{1}{3}+\frac{1}{4}}{\frac{5}{4}-\frac{5}{6}+\frac{5}{8}}\)
b) Cho 3 so x,y,z la 3 so khac 0 thoa man dieu kien :
\(\frac{y+z-x}{x}=\frac{z+x-y}{y}=\frac{x+y-z}{z}\)
Hay tinh gia tri bieu thuc:\(B=\left(1+\frac{x}{y}\right)\left(1+\frac{y}{z}\right)\left(1+\frac{z}{x}\right)\)
cho x/2=y/5=z/5. Hay tinh gia tri cua bieu thuc
A =x-y+z /x+2y-z
cho x,y,z la 3 so thuc tuy y thoa man x+y+z=0 va -1< x<1,-1<y<1,-1<z<1.chung minh rang da thuc x^2+y^4+z^6 co gia tri khong lon hon 2
Cho x.y.z khac 0 va x+y+z=0 .Tinh
(1+x/y)(1+y/z)(1+z/x)