7.1 - Home> My Assignments> Section 7.1(Homework About this Assignment SMALL BRIAN DIXON MA 241 section 009 Fall 2005 Instructor Drew Pasteur

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Unformatted text preview: Home > My Assignments > Section 7.1 (Homework) About this Assignment SMALL BRIAN DIXON MA 241, section 009, Fall 2005 Instructor: Drew Pasteur North Carolina State University Due: Tuesday, October 11, 2005 11:00 PM EDT Description Modeling with Current Score: 0.5 out of 11.5 Differential Equations Question Score pts subs 1 0/2 1/20 2 -/2 -/20 0/4 Viewing: Last Response View: All Responses Notes pts subs 1 -/2 -/20 2 -/2 -/20 3 -/2 -/20 -/0. 4 -/20 5 -/0. 5 -/20 5 Notes 1. [SCalcCC2 7.1.04.] For what values of r does the function y = ert satisfy the differential equation y'' + y' - 30y = 0? r = 0 [-6] (smaller value) r = (No Response)[5] (larger value) 2. [SCalcCC2 7.1.10.] A function y(t) satisfies the differential equation below. (a) What are the constant solutions of the equation? (No Response)[0] (smallest value) (No Response)[1] (No Response)[8] (largest value) (b) For what values of y is y increasing? (Select all that apply.) [_] [x] (- , 0) [_] [_] (- , 1) [_] [x] (0,1) [_] [_] (0,8) [_] [_] (0,9) [_] [_] (1,8) [_] [_] (1,9) [_] [_] (9, ) [_] [x] (8, ) (c) For what values of y is y decreasing? (Select all that apply.) [_] [_] (- , 0) [_] [_] (- , 1) [_] [_] (0,1) [_] [_] (0,8) [_] [_] (0,9) [_] [x] (1,8) [_] [_] (1,9) [_] [_] (9, ) [_] [_] (8, ) pts subs 1 0.5/0.5 1/20 0.5/0.5 Viewing: Last Response View: All Responses Notes 3. [SCalcCC2 7.1.12.] The function with the given graph is a solution of one of the following differential equations. Decide which is the correct equation. (o) (o) y' = 1 - 2xy (_) (_) y' = -2xy (_) (_) y' = 1 + xy Home My Assignments ...
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This note was uploaded on 10/21/2009 for the course MATH MA241 taught by Professor Hubbard during the Spring '09 term at N.C. Central.

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