Mathematics

Material on the Final Exam

The final exam is Friday, May 5, 8:00 - 11:00 a.m., in the usual room.

Calculators may be used for arithmetic only.

Please bring your text to the final exam. You can use the integral table inside the front cover, and the Laplace transform table and other information inside the back cover.

The exam will cover first-order equations (Secs. 1.1 - 1.3, 2.2 - 2.3, pp. 34 - 36, and 3.2 only), second-order linear equations (Secs. 4.2 - 4.6 only), Laplace transforms (Secs. 7.2 - 7.6, 7.8), linear systems (Secs. 9.2 - 9.6), and the phase plane (Secs. 5.4 and 12.1 - 12.3).

For first-order equations, second-order linear equations, Laplace transforms, linear systems, and Sec. 5.4, you can use the review sheets for Tests 1, 2 and 3. Omit material from sections that are not listed above.

Things you should be able to do from Chapter 12:

Sec. 12.2. For x'=ax+by, y'=cx+dy, use eigenvalues and eigenvectors to sketch trajectories. Use eigenvalues to identify equilibria as attracting or repelling nodes, spiral attractors or repellers, saddles, or centers.

Sec. 12.3. For x'=f(x,y), y'=g(x,y), find nullclines, find equilibria, find the matrix of the linearization at each equilibrium, find its eigenvalues and eigenvectors, use this information to help sketch the trajectories of the nonlinear system.

I suggest reviewing Tests 1, 2 and 3. On Test 1, omit questions 2 and 5.

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