Question

x+1分之1减x方-1分之x+3乘x方+4x+3分之x方-2x+1

Answer 1

1/(x+1)-x/(x^2-1)+(x^2-2x+1)/(3x^2+4x+3)

=-1/(x^2-1)+(x-1)^2/(x+1)(3x+1)

=1/(x+1)*((x-1)^2/(3x+1)-1/(x-1))

=1/(x+1)*(x^2-5x)/(x-1)(3x+1)

=x(x-5)/((x+1)(x-1)(3x+1))

也不知道对不对