Question

化简x/(x-1)^2-1/(x-1)^2

Answer 1

1.1/x-1

2.x/()(x-2)(x+2)-2/(x+2)(x-2)-1/2(x-2)

=x+2/2(x-2)^2

3.

m/m+3+[b/(m-3)(m+3)×(m-3)(m+3)/2(m+3)]

=3+m/m+3

=1