Question

若方程(x-3)/(x-2)=m/(2-x)无解,则m=?

Answer 1

(x-3)/(x-2)=m/(2-x)

(x-3)/(x-2)=-m/(x-2)

x-3=-m

x=3-m

无解

所以这是增根

即分母等于0

x-2=0

x=2

3-m=2

m=1