- 34

- 1

**1. The problem statement, all variables and given/known data**

Question:

If ##r_+ \neq r_{++}## and ## g(r=r_+) \neq g(r=r_{++}) ##

When is it fulfilled that ## d g (r=r_+) \neq d g (r=r_+) ## ?

**2. Relevant equations**

##r_+ \neq r_{++}##

## g(r=r_+) \neq g(r=r_{++}) ##

**3. The attempt at a solution**

I tried computing ## dg(r_+) = \frac{\partial g}{\partial r} \Big |_{r=r_+} dr_+##, but i am very confused. This is all the information that i have of this problem.