Answer:
r = -9
Step-by-step explanation:
the less the negative number is the more it is .
Answer:
7.8655
Step-by-step explanation:
Given the functionl

Where,

We have, replacing,

We need to derivate and verify for stable equilibrum that,

Then,

Roots in,

We obtain U"(x), then we have

For
Unestable
For
Stable