将下列各关系式写成y=f(x)的形式. (1)4x-2y=1; (2)xy=3; (3)x+xy=1; (4)x+y+xy-1=0.
问题描述:
将下列各关系式写成y=f(x)的形式. (1)4x-2y=1; (2)xy=3; (3)x+xy=1; (4)x+y+xy-1=0.
答
1.y=2x-1/2
2.y=3/x
3.y=(1/x)-1
4.y=(1-x)/(1+x)