Class 1/14
Today (1/14) in class, we reviewed sign charts and what they tell us.
Key concepts include:
* The 2nd derivative gives possible points of inflection
* If f”(c) = 0 then x = c is a possible point of inflection
* If f”(x)>0 then f(x) is concave up, if f”(x)<0 then f(x) is concave down
* Points of inflection = change of concavity
Page 361 has definitions of more graph characteristics.
We also reviewed how to do R2 on 427 (which was homework)
P.S. Always check endpoints (if you are given a domain)
If the graph of derivative crosses the x-axis, the point at which it does so is a (relative) minimum or maximum
Homework: All multiple choice questions in packet and choose some to do from the other packet. Due Friday.
