lecture02

lecture02 - Chapter 1: sec. 1.1, 1.2 contd,1.3 Jan 20, 2008...

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Unformatted text preview: Chapter 1: sec. 1.1, 1.2 contd,1.3 Jan 20, 2008 Lecture 02 Today If you have not done so, visit http://d2l.arizona.edu Use your NetID for username and regular password (as when you check your email.arizona.edu account). Your NetID is the key to everything. Use it to access D2L WebAssign Class Key: arizona 9835 7019 Clickers (Register your clickers via D2L, by Jan 27) Syllabus accessible (in addition to D2L) at: http://math.arizona.edu/ hermi/spring09 Lecture 02 Remember: WebAssign homework is already online, start working on it. The Review Test is Jan 27th (so practice the review problems in D2L) First Hand-in Homework (2 problems) due Wed Jan 21st (tomorrow). Lecture 02 Initial Value Problem (IVP) An IVP is a differential equation of a given order in which initial conditions (as many as the order) are given. Example: Solve the IVP dy dt = 100- y subject to y (0) = 80. Separation of variable: dy 100- y = dt We integrate both sides to get: integraldisplay dy 100- y = integraldisplay dt That is- ln | 100- y | = t + K Lecture 02 Example 1, contd...
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lecture02 - Chapter 1: sec. 1.1, 1.2 contd,1.3 Jan 20, 2008...

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