Exam I will be in the usual classroom on Tuesday, February 14, 2006. It
will cover the material up through the gradient, that is, sections 14.3-14.4
15.1, and 15.3-15.6.
Calculators or other mechanical assistance are not needed and are not to be
used. Blank paper will be provided, so all you will need is something to
write with.
The exam will be challenging (but doable), exam grades in this class
usually run from 40% to 85%. Just relax and do your best. As on any
exam, it is wise to start with the problems that you feel confident that
you know how to do, before moving on to others.
The first main topic is the geometry of curves in space, that is, the unit
tangent, normal, and binormal vectors, curvature, and torsion. You do not
need to memorize the formulas, as all necessary formulas for calculation
will be given. On the other hand, you need to be familiar with them if you
expect to be able to use them with any facility, and you should know the
definition and meaning of curvature and torsion.
Most of the exam covers partial derivatives, the Chain Rule, and the
gradient. The gradient is heavily emphasized, and one needs to know both
the geometric content and the details of using the gradient in
calculations. The following will definitely be covered, although the exam
not necessarily limited to these topics:
1. | Functions of more than one variable, their graphs, and their level lines/surfaces. |
2. | Calculation and geometric interpretation of partial derivatives. |
3. | Implicit differentiation. |
4. | The differential of a function of more than one variable, and its use in linear approximation. Problem 15.4 #38 is a very good example. |
5. | Everything about the gradient. Know the core material, and be able to use the gradient to calculate directional derivatives, normal lines to level curves, and normal lines and tangent planes to level surfaces. For the latter, it is necessary to know the equations for lines (at least, the parametric and vector-valued function versions) and the equation for a plane in terms of a normal vector. |