高中數學M2 ~! 有答案~! ?

∫_[m to 0] p(x)/(p(x)+1) dx
   = -∫_[0 to m] p(x)/(p(x)+1) dx
   = - ∫_[0 to m] {1- 1/(p(x)+1)] dx
   = - ∫_[0 to m] 1 dx + ∫_[0 to m] 1/(p(x)+1) dx
   = -m + ∫_[0 to m] 1/(p(x)+1) dx
   = -m -5