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 is differentiable in , with
-
- If has no zero in , then is differentiable in , with
-
- If has no zero in , then is differentiable in , with
-