Let
be a subset,
a point and
-
functions
which are
differentiable
in . Then the following rules for differentiability holds.
- The sum is differentiable in with
-
- The product is differentiable in with
-
- For
also in differentiable with
-
- If has no zero in , then is differentiable in with
-
- If has no zero in , then id differentiable in with
-