Fundamentals of Differential Equations and Boundary Value Problems
7th Edition
ISBN: 9780321977106
Author: Nagle, R. Kent
Publisher: Pearson Education, Limited
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Textbook Question
Chapter 8.3, Problem 1E
In Problems 1–10, determine all the singular points of the given differential equation.
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Students have asked these similar questions
Problem 11 (a) A tank is discharging water through an orifice at a depth of T
meter below the surface of the water whose area is A m². The
following are the values of a for the corresponding values of A:
A 1.257 1.390
x 1.50 1.65
1.520 1.650 1.809 1.962 2.123 2.295 2.462|2.650
1.80 1.95 2.10 2.25 2.40 2.55 2.70
2.85
Using the formula
-3.0
(0.018)T =
dx.
calculate T, the time in seconds for the level of the water to drop
from 3.0 m to 1.5 m above the orifice.
(b) The velocity of a train which starts from rest is given by the fol-
lowing table, the time being reckoned in minutes from the start
and the speed in km/hour:
| † (minutes) |2|4 6 8 10 12
14 16 18 20
v (km/hr) 16 28.8 40 46.4 51.2 32.0 17.6 8 3.2 0
Estimate approximately the total distance ran in 20 minutes.
-
Let n = 7, let p = 23 and let S be the set of least positive residues mod p of the first (p − 1)/2
multiple of n, i.e.
n mod p, 2n mod p, ...,
p-1
2
-n mod p.
Let T be the subset of S consisting of those residues which exceed p/2.
Find the set T, and hence compute the Legendre symbol (7|23).
23
32
how come?
The first 11 multiples of 7 reduced mod 23 are
7, 14, 21, 5, 12, 19, 3, 10, 17, 1, 8.
The set T is the subset of these residues exceeding
So T = {12, 14, 17, 19, 21}.
By Gauss' lemma (Apostol Theorem 9.6),
(7|23) = (−1)|T| = (−1)5 = −1.
Let n = 7, let p = 23 and let S be the set of least positive residues mod p of the first (p-1)/2
multiple of n, i.e.
n mod p, 2n mod p, ...,
2
p-1
-n mod p.
Let T be the subset of S consisting of those residues which exceed p/2.
Find the set T, and hence compute the Legendre symbol (7|23).
The first 11 multiples of 7 reduced mod 23 are
7, 14, 21, 5, 12, 19, 3, 10, 17, 1, 8.
23
The set T is the subset of these residues exceeding
2°
So T = {12, 14, 17, 19, 21}.
By Gauss' lemma (Apostol Theorem 9.6),
(7|23) = (−1)|T| = (−1)5 = −1.
how come?
Chapter 8 Solutions
Fundamentals of Differential Equations and Boundary Value Problems
Ch. 8.1 - In Problems 18, determine the first three nonzero...Ch. 8.1 - In Problems 18, determine the first three nonzero...Ch. 8.1 - In Problems 18, determine the first three nonzero...Ch. 8.1 - In Problems 18, determine the first three nonzero...Ch. 8.1 - In Problems 18, determine the first three nonzero...Ch. 8.1 - In Problems 1-8, determine the first three nonzero...Ch. 8.1 - In Problems 1-8, determine the first three nonzero...Ch. 8.1 - In Problems 1-8, determine the first three nonzero...Ch. 8.1 - a. Construct the Taylor polynomial p3(x) of degree...Ch. 8.1 - a. Construct the Taylor polynomial p3(x) of degree...
Ch. 8.1 - Prob. 11ECh. 8.1 - Prob. 12ECh. 8.1 - Duffings Equation. In the study of a nonlinear...Ch. 8.1 - Soft versus Hard Springs. For Duffings equation...Ch. 8.1 - Prob. 15ECh. 8.1 - van der Pol Equation. In the study of the vacuum...Ch. 8.2 - In Problems 1-6, determine the convergence set of...Ch. 8.2 - In Problems 1-6, determine the convergence set of...Ch. 8.2 - In Problems 1-6, determine the convergence set of...Ch. 8.2 - In Problems 1-6, determine the convergence set of...Ch. 8.2 - In Problems 1-6, determine the convergence set of...Ch. 8.2 - In Problems 1-6, determine the convergence set of...Ch. 8.2 - Prob. 7ECh. 8.2 - Determine the convergence set of the given power...Ch. 8.2 - In Problems 9 and 10, find the power series...Ch. 8.2 - In Problems 9 and 10, find the power series...Ch. 8.2 - In Problems 11-14, find the first three nonzero...Ch. 8.2 - In Problems 11-14, find the first three nonzero...Ch. 8.2 - Prob. 13ECh. 8.2 - In Problems 11-14, find the first three nonzero...Ch. 8.2 - Prob. 15ECh. 8.2 - Prob. 16ECh. 8.2 - Prob. 17ECh. 8.2 - In Problems 17-20, find a power series expansion...Ch. 8.2 - Prob. 19ECh. 8.2 - In Problems 17-20, find a power series expansion...Ch. 8.2 - Prob. 21ECh. 8.2 - In Problems 21 and 22, find a power series...Ch. 8.2 - Prob. 23ECh. 8.2 - In Problems 23-26, express the given power series...Ch. 8.2 - Prob. 25ECh. 8.2 - In Problems 23-26, express the given power series...Ch. 8.2 - Prob. 27ECh. 8.2 - Show that...Ch. 8.2 - In Problems 29-34, determine the Taylor series...Ch. 8.2 - In Problems 2934, determine the Taylor series...Ch. 8.2 - Prob. 31ECh. 8.2 - In Problems 2934, determine the Taylor series...Ch. 8.2 - Prob. 33ECh. 8.2 - In Problems 2934, determine the Taylor series...Ch. 8.2 - Prob. 35ECh. 8.2 - Let f(x) and g(x) be analytic at x0. Determine...Ch. 8.2 - Prob. 37ECh. 8.2 - Prob. 38ECh. 8.3 - In Problems 110, determine all the singular points...Ch. 8.3 - In Problems 110, determine all the singular points...Ch. 8.3 - In Problems 110, determine all the singular points...Ch. 8.3 - Prob. 4ECh. 8.3 - In Problem 110, determine all the singular points...Ch. 8.3 - Prob. 6ECh. 8.3 - Prob. 7ECh. 8.3 - In Problems 110, determine all the singular points...Ch. 8.3 - In Problems 110, determine all the singular points...Ch. 8.3 - In Problems 110, determine all the singular points...Ch. 8.3 - In Problems 1118, find at least the first four...Ch. 8.3 - In Problems 1118, find at least the first four...Ch. 8.3 - Prob. 13ECh. 8.3 - In Problems 1118, find at least the first four...Ch. 8.3 - In Problems 1118, find at least the first four...Ch. 8.3 - Prob. 16ECh. 8.3 - In Problems 1118, find at least the first four...Ch. 8.3 - Prob. 18ECh. 8.3 - In Problems 1924, find a power series expansion...Ch. 8.3 - In Problems 1924, find a power series expansion...Ch. 8.3 - In Problems 1924, find a power series expansion...Ch. 8.3 - In Problems 1924, find a power series expansion...Ch. 8.3 - In Problems 1924, find a power series expansion...Ch. 8.3 - In Problems 19-24, find a power series expansion...Ch. 8.3 - In Problems 25-28, find at least the first four...Ch. 8.3 - Prob. 26ECh. 8.3 - In Problems 25-28, find at least the first four...Ch. 8.3 - In Problems 25-28, find at least the first four...Ch. 8.3 - Prob. 29ECh. 8.3 - Prob. 30ECh. 8.3 - In Problems 29-31, use the first few terms of the...Ch. 8.3 - Prob. 32ECh. 8.3 - Use the ratio test to show that the radius of...Ch. 8.3 - Prob. 34ECh. 8.3 - Prob. 35ECh. 8.3 - Variable Spring Constant. As a spring is heated,...Ch. 8.4 - In Problems 16, find a minimum value for the...Ch. 8.4 - In Problems 16, find a minimum value for the...Ch. 8.4 - In Problems 16, find a minimum value for the...Ch. 8.4 - In Problems 16, find a minimum value for the...Ch. 8.4 - Prob. 5ECh. 8.4 - In Problems 16, find a minimum value for the...Ch. 8.4 - In Problems 712, find at least the first four...Ch. 8.4 - In Problems 712, find at least the first four...Ch. 8.4 - In Problems 712, find at least the first four...Ch. 8.4 - Prob. 10ECh. 8.4 - In Problems 712, find at least the first four...Ch. 8.4 - In Problems 712, find at least the first four...Ch. 8.4 - In Problems 1319, find at least the first four...Ch. 8.4 - In Problems 1319, find at least the first four...Ch. 8.4 - In Problems 1319, find at least the first four...Ch. 8.4 - Prob. 16ECh. 8.4 - In Problems 13-19, find at least the first four...Ch. 8.4 - In Problems 13-19, find at least the first four...Ch. 8.4 - In Problems 13-19, find at least the first four...Ch. 8.4 - To derive the general solution given by equations...Ch. 8.4 - In Problems 21-28, use the procedure illustrated...Ch. 8.4 - Prob. 22ECh. 8.4 - In Problems 21-28, use the procedure illustrated...Ch. 8.4 - Prob. 24ECh. 8.4 - In Problems 21-28, use the procedure illustrated...Ch. 8.4 - In Problems 21-28, use the procedure illustrated...Ch. 8.4 - In Problems 21-28, use the procedure illustrated...Ch. 8.4 - Prob. 28ECh. 8.4 - The equation (1x2)y2xy+n(n+1)y=0, where n is an...Ch. 8.4 - Aging Spring. As a spring ages, its spring...Ch. 8.4 - Aging Spring without Damping. In the mass-spring...Ch. 8.5 - Prob. 1ECh. 8.5 - Prob. 2ECh. 8.5 - Prob. 3ECh. 8.5 - Prob. 4ECh. 8.5 - Prob. 5ECh. 8.5 - Prob. 6ECh. 8.5 - Prob. 7ECh. 8.5 - Prob. 8ECh. 8.5 - Prob. 9ECh. 8.5 - Prob. 10ECh. 8.5 - Prob. 11ECh. 8.5 - Prob. 12ECh. 8.5 - Prob. 13ECh. 8.5 - Prob. 14ECh. 8.5 - Prob. 15ECh. 8.5 - Prob. 16ECh. 8.5 - In Problems 15-17, solve the given initial value...Ch. 8.5 - Prob. 18ECh. 8.5 - Prob. 19ECh. 8.6 - In Problems 1-10, classify each singular point...Ch. 8.6 - Prob. 2ECh. 8.6 - Prob. 3ECh. 8.6 - Prob. 4ECh. 8.6 - Prob. 5ECh. 8.6 - Prob. 6ECh. 8.6 - Prob. 7ECh. 8.6 - Prob. 8ECh. 8.6 - Prob. 9ECh. 8.6 - Prob. 10ECh. 8.6 - Prob. 11ECh. 8.6 - In Problems 11-18, find the indicial equation and...Ch. 8.6 - In Problems 11-18, find the indicial equation and...Ch. 8.6 - In Problems 11-18, find the indicial equation and...Ch. 8.6 - In Problems 11-18, find the indicial equation and...Ch. 8.6 - In Problems 1118, find the indicial equation and...Ch. 8.6 - In Problems 1118, find the indicial equation and...Ch. 8.6 - In Problems 1118, find the indicial equation and...Ch. 8.6 - Prob. 19ECh. 8.6 - Prob. 20ECh. 8.6 - Prob. 21ECh. 8.6 - Prob. 22ECh. 8.6 - Prob. 23ECh. 8.6 - Prob. 24ECh. 8.6 - Prob. 25ECh. 8.6 - Prob. 26ECh. 8.6 - Prob. 27ECh. 8.6 - Prob. 28ECh. 8.6 - Prob. 29ECh. 8.6 - Prob. 30ECh. 8.6 - Prob. 31ECh. 8.6 - Prob. 32ECh. 8.6 - Prob. 33ECh. 8.6 - Prob. 34ECh. 8.6 - Prob. 35ECh. 8.6 - Prob. 36ECh. 8.6 - Prob. 37ECh. 8.6 - Prob. 38ECh. 8.6 - In Problems 39 and 40, try to use the method of...Ch. 8.6 - Prob. 40ECh. 8.6 - Prob. 41ECh. 8.6 - Prob. 42ECh. 8.6 - Prob. 43ECh. 8.6 - Prob. 44ECh. 8.6 - Prob. 45ECh. 8.6 - Prob. 46ECh. 8.6 - Prob. 47ECh. 8.7 - In Problems 1-14, find at least the first three...Ch. 8.7 - Prob. 2ECh. 8.7 - Prob. 3ECh. 8.7 - Prob. 4ECh. 8.7 - Prob. 5ECh. 8.7 - In Problems 1-14, find at least the first three...Ch. 8.7 - Prob. 7ECh. 8.7 - Prob. 8ECh. 8.7 - In Problems 1-14, find at least the first three...Ch. 8.7 - Prob. 10ECh. 8.7 - Prob. 11ECh. 8.7 - Prob. 12ECh. 8.7 - Prob. 13ECh. 8.7 - Prob. 14ECh. 8.7 - In Problems 15 and 16, determine whether the given...Ch. 8.7 - Prob. 16ECh. 8.7 - In Problems 17-20, find at least the first three...Ch. 8.7 - Prob. 18ECh. 8.7 - In Problems 17-20, find at least the first three...Ch. 8.7 - Prob. 20ECh. 8.7 - Prob. 21ECh. 8.7 - In Problem 21 consider a column with a rectangular...Ch. 8.7 - Prob. 23ECh. 8.7 - Prob. 24ECh. 8.7 - Prob. 25ECh. 8.7 - To obtain two linearly independent solutions to...Ch. 8.8 - In Problems 1-4, express a general solution to the...Ch. 8.8 - Prob. 2ECh. 8.8 - In Problems 1-4, express a general solution to the...Ch. 8.8 - In Problems 1-4, express a general solution to the...Ch. 8.8 - Prob. 5ECh. 8.8 - Prob. 6ECh. 8.8 - Prob. 7ECh. 8.8 - Prob. 8ECh. 8.8 - Prob. 9ECh. 8.8 - Prob. 10ECh. 8.8 - Show that the confluent hypergeometric equation...Ch. 8.8 - Prob. 12ECh. 8.8 - Prob. 13ECh. 8.8 - Prob. 14ECh. 8.8 - Prob. 15ECh. 8.8 - Prob. 16ECh. 8.8 - Prob. 17ECh. 8.8 - Prob. 18ECh. 8.8 - In Problems 19 and 20, a Bessel equation is given....Ch. 8.8 - Prob. 21ECh. 8.8 - Prob. 22ECh. 8.8 - Prob. 23ECh. 8.8 - Prob. 24ECh. 8.8 - Show that J1/2(x)=(2/x)1/2sinx and...Ch. 8.8 - The Bessel functions of order v=n+1/2, n any...Ch. 8.8 - Prob. 27ECh. 8.8 - Prob. 28ECh. 8.8 - Prob. 29ECh. 8.8 - Prob. 30ECh. 8.8 - Prob. 31ECh. 8.8 - To prove Rodriguess formula (52) for Legendre...Ch. 8.8 - Prob. 34ECh. 8.8 - Prob. 35ECh. 8.8 - Prob. 36ECh. 8.8 - The Hermite polynomials Hn(x) are polynomial...Ch. 8.8 - Prob. 38ECh. 8.8 - Prob. 39ECh. 8.8 - Reduction to Bessels Equation. The class of...Ch. 8.8 - a. Show that the substitution z(x)=xy(x) renders...Ch. 8.RP - Find the first four nonzero terms in the Taylor...Ch. 8.RP - Prob. 2RPCh. 8.RP - Find at least the first four nonzero terms in a...Ch. 8.RP - Prob. 4RPCh. 8.RP - Find at least the first four nonzero terms in a...Ch. 8.RP - Prob. 6RPCh. 8.RP - Use the method of Frobenius to find at least the...Ch. 8.RP - Find the indicial equation and its roots and state...Ch. 8.RP - Find at least the first three nonzero terms in the...
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