Fundamentals of Differential Equations (9th Edition)
9th Edition
ISBN: 9780321977069
Author: R. Kent Nagle, Edward B. Saff, Arthur David Snider
Publisher: PEARSON
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1.
2.
Show that the following are not logically equivalent by finding a counterexample:
(p^q) →r and
(db) V (d←d)
Show that the following is not a contradiction by finding a counterexample:
(pV-q) AqA (pv¬q Vr)
3.
Here is a purported proof that (pq) ^ (q → p) = F:
(db) v (bd) = (db) v (bd)
=(qVp) A (g→p)
= (¬¬q V ¬p) ^ (q→ p)
(db) V (db) =
=¬(a→p)^(a→p)
= (gp) ^¬(a → p)
=F
(a) Show that (pq) ^ (q→p) and F are not logically equivalent by finding a counterex-
ample.
(b) Identify the error(s) in this proof and justify why they are errors. Justify the other steps
with their corresponding laws of propositional logic.
5
Show by multiplying matrices that the following equation represents an ellipse:
5
-
-7
I
(x)(3)()=30.
y)
7
7)
Chapter 3 Solutions
Fundamentals of Differential Equations (9th Edition)
Ch. 3.2 - A brine solution of salt flows at a constant rate...Ch. 3.2 - A brine solution of salt flows at a constant rate...Ch. 3.2 - Prob. 3ECh. 3.2 - Prob. 4ECh. 3.2 - A swimming pool whose volume is 10,000 gal...Ch. 3.2 - The air in a small room 12 ft by 8 ft by 8 ft is...Ch. 3.2 - Prob. 7ECh. 3.2 - A tank initially contains s0 lb of salt dissolved...Ch. 3.2 - In 1990 the Department of Natural Resources...Ch. 3.2 - Use a sketch of the phase line (see Project B,...
Ch. 3.2 - Use a sketch of the phase line (see Project B,...Ch. 3.2 - Prob. 12ECh. 3.2 - In Problem 9, suppose we have the additional...Ch. 3.2 - Prob. 14ECh. 3.2 - In Problem 14, suppose we have the additional...Ch. 3.2 - Prob. 16ECh. 3.2 - Prob. 17ECh. 3.2 - Using the U.S. census data in Table 3.1 for 1900,...Ch. 3.2 - The initial mass of a certain species of fish is 7...Ch. 3.2 - Prob. 20ECh. 3.2 - Prob. 21ECh. 3.2 - Prob. 22ECh. 3.2 - Prob. 23ECh. 3.2 - Prob. 24ECh. 3.2 - Prob. 25ECh. 3.2 - Prob. 26ECh. 3.2 - Prob. 27ECh. 3.3 - A cup of hot coffee initially at 95C cools to 80C...Ch. 3.3 - Prob. 2ECh. 3.3 - Prob. 3ECh. 3.3 - Prob. 4ECh. 3.3 - It was noon on a cold December day in Tampa: 16C....Ch. 3.3 - Prob. 6ECh. 3.3 - Prob. 7ECh. 3.3 - Prob. 8ECh. 3.3 - Prob. 9ECh. 3.3 - Early Monday morning, the temperature in the...Ch. 3.3 - Prob. 11ECh. 3.3 - Prob. 12ECh. 3.3 - Prob. 13ECh. 3.3 - Prob. 14ECh. 3.3 - Prob. 15ECh. 3.3 - Prob. 16ECh. 3.4 - Prob. 1ECh. 3.4 - Prob. 2ECh. 3.4 - Prob. 3ECh. 3.4 - Prob. 4ECh. 3.4 - Prob. 5ECh. 3.4 - Prob. 6ECh. 3.4 - Prob. 7ECh. 3.4 - Prob. 8ECh. 3.4 - Prob. 9ECh. 3.4 - Prob. 10ECh. 3.4 - Prob. 11ECh. 3.4 - Unless otherwise stated, in the following problems...Ch. 3.4 - Prob. 13ECh. 3.4 - Prob. 14ECh. 3.4 - Prob. 15ECh. 3.4 - Prob. 16ECh. 3.4 - Prob. 17ECh. 3.4 - When an object slides on a surface, it encounters...Ch. 3.4 - Prob. 19ECh. 3.4 - Prob. 20ECh. 3.4 - Prob. 21ECh. 3.4 - Prob. 22ECh. 3.4 - Prob. 23ECh. 3.4 - Prob. 24ECh. 3.4 - Escape Velocity. According to Newtons law of...Ch. 3.5 - Prob. 1ECh. 3.5 - Prob. 2ECh. 3.5 - Prob. 3ECh. 3.5 - Prob. 4ECh. 3.5 - The power generated or dissipated by a circuit...Ch. 3.5 - Prob. 6ECh. 3.5 - Prob. 7ECh. 3.5 - A 108-F capacitor (10 nanofarads) is charged to 50...Ch. 3.6 - Prob. 1ECh. 3.6 - Prob. 2ECh. 3.6 - Prob. 3ECh. 3.6 - Prob. 4ECh. 3.6 - Prob. 5ECh. 3.6 - Prob. 6ECh. 3.6 - Prob. 7ECh. 3.6 - Prob. 8ECh. 3.6 - Prob. 9ECh. 3.6 - Prob. 10ECh. 3.6 - Prob. 11ECh. 3.6 - Prob. 12ECh. 3.6 - Prob. 13ECh. 3.6 - Prob. 14ECh. 3.6 - Prob. 15ECh. 3.6 - Prob. 16ECh. 3.6 - In many of the following problems, it will be...Ch. 3.6 - In Exercises 13-18, use a calculator or a computer...Ch. 3.6 - Prob. 19ECh. 3.6 - Prob. 20ECh. 3.7 - Prob. 1ECh. 3.7 - Prob. 2ECh. 3.7 - As in Exercises 3.6, for some problems you will...Ch. 3.7 - As in Exercises 3.6, for some problems you will...Ch. 3.7 - Prob. 5ECh. 3.7 - Prob. 6ECh. 3.7 - Prob. 7ECh. 3.7 - Prob. 8ECh. 3.7 - Prob. 9ECh. 3.7 - Prob. 10ECh. 3.7 - As in Exercises 3.6, for some problems you will...Ch. 3.7 - Prob. 12ECh. 3.7 - Prob. 13ECh. 3.7 - Prob. 14ECh. 3.7 - Prob. 15ECh. 3.7 - Prob. 16ECh. 3.7 - Prob. 17ECh. 3.7 - Prob. 18ECh. 3.7 - Prob. 19ECh. 3.7 - Prob. 20ECh. 3.7 - Prob. 21E
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