X+1/Y=4 Y+1/Z=1 Z+1/X=7/3
则xyz的值为多少
(X+1/Y)(Z+1/X)(Y+1/Z)=XYZ+1/(XYZ)+X+Y+Z+1/X+1/Y+1/Z=XYZ+1/(XYZ)+4+1+7/3=4*1*7/3
得到: XYZ+1/(XYZ)=2,
解得XYZ=1