Pearson eText Fundamentals of Differential Equations with Boundary Value Problems -- Instant Access (Pearson+)
7th Edition
ISBN: 9780137394524
Author: R. Nagle, Edward Saff
Publisher: PEARSON+
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Textbook Question
Chapter 2.2, Problem 2E
In Problems 1-6, determine whether the given differential equation is separable.
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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 2 Solutions
Pearson eText Fundamentals of Differential Equations with Boundary Value Problems -- Instant Access (Pearson+)
Ch. 2.2 - Prob. 1ECh. 2.2 - In Problems 1-6, determine whether the given...Ch. 2.2 - Prob. 3ECh. 2.2 - Prob. 4ECh. 2.2 - Prob. 5ECh. 2.2 - Prob. 6ECh. 2.2 - Prob. 7ECh. 2.2 - Prob. 8ECh. 2.2 - Prob. 9ECh. 2.2 - Prob. 10E
Ch. 2.2 - Prob. 11ECh. 2.2 - Prob. 12ECh. 2.2 - Prob. 13ECh. 2.2 - Prob. 14ECh. 2.2 - Prob. 15ECh. 2.2 - Prob. 16ECh. 2.2 - Prob. 17ECh. 2.2 - Prob. 18ECh. 2.2 - Prob. 19ECh. 2.2 - Prob. 20ECh. 2.2 - Prob. 21ECh. 2.2 - Prob. 22ECh. 2.2 - Prob. 23ECh. 2.2 - Prob. 24ECh. 2.2 - Prob. 25ECh. 2.2 - Prob. 26ECh. 2.2 - Solutions Not Expressible in Terms of Elementary...Ch. 2.2 - Sketch the solution to the initial value problem...Ch. 2.2 - Prob. 29ECh. 2.2 - As stated in this section, the separation of...Ch. 2.2 - Interval of Definition. By looking at an initial...Ch. 2.2 - Analyze the solution y=(x) to the initial value...Ch. 2.2 - Prob. 33ECh. 2.2 - Prob. 34ECh. 2.2 - Prob. 35ECh. 2.2 - Prob. 36ECh. 2.2 - Prob. 37ECh. 2.2 - Prob. 38ECh. 2.2 - Prob. 39ECh. 2.2 - The atmospheric pressure force per unit area on a...Ch. 2.3 - In Problem 1-6, Determine whether the given...Ch. 2.3 - Prob. 2ECh. 2.3 - Prob. 3ECh. 2.3 - Prob. 4ECh. 2.3 - Prob. 5ECh. 2.3 - Prob. 6ECh. 2.3 - Prob. 7ECh. 2.3 - In Problems 7-16, obtain the general solution to...Ch. 2.3 - In Problems 7-16, obtain the general solution to...Ch. 2.3 - Prob. 10ECh. 2.3 - In Problems 7-16, obtain the general solution to...Ch. 2.3 - Prob. 12ECh. 2.3 - Prob. 13ECh. 2.3 - In Problems 7-16, obtain the general solution to...Ch. 2.3 - In Problems 7-16, obtain the general solution to...Ch. 2.3 - In Problems 7-16, obtain the general solution to...Ch. 2.3 - In Problems 17-22, solve the initial value...Ch. 2.3 - In Problem 17-22, solve the initial value problem....Ch. 2.3 - In Problem 17-22, solve the initial value problem....Ch. 2.3 - Prob. 20ECh. 2.3 - Prob. 21ECh. 2.3 - Prob. 22ECh. 2.3 - Prob. 23ECh. 2.3 - Prob. 24ECh. 2.3 - Prob. 25ECh. 2.3 - Prob. 26ECh. 2.3 - Constant Multiples of Solutions. a. Show that y=ex...Ch. 2.3 - Prob. 29ECh. 2.3 - Prob. 30ECh. 2.3 - Discontinuous Coefficients. As we will see in...Ch. 2.3 - Prob. 32ECh. 2.3 - Prob. 33ECh. 2.3 - Prob. 34ECh. 2.3 - Mixing Suppose a brine containing 0.2kg of salt...Ch. 2.3 - Variation of Parameters. Here is another procedure...Ch. 2.3 - Prob. 37ECh. 2.3 - Prob. 38ECh. 2.3 - The Nobel Prize in Physiology or Medicine in 1963...Ch. 2.4 - Prob. 1ECh. 2.4 - Prob. 2ECh. 2.4 - Prob. 3ECh. 2.4 - Prob. 4ECh. 2.4 - Prob. 5ECh. 2.4 - Prob. 6ECh. 2.4 - Prob. 7ECh. 2.4 - Prob. 8ECh. 2.4 - Prob. 9ECh. 2.4 - Prob. 10ECh. 2.4 - Prob. 11ECh. 2.4 - Prob. 12ECh. 2.4 - Prob. 13ECh. 2.4 - Prob. 14ECh. 2.4 - Prob. 15ECh. 2.4 - Prob. 16ECh. 2.4 - Prob. 17ECh. 2.4 - Prob. 18ECh. 2.4 - Prob. 19ECh. 2.4 - In Problems 9-20, determine whether the equation...Ch. 2.4 - Prob. 21ECh. 2.4 - Prob. 22ECh. 2.4 - Prob. 23ECh. 2.4 - Prob. 24ECh. 2.4 - Prob. 25ECh. 2.4 - Prob. 26ECh. 2.4 - Prob. 27ECh. 2.4 - Prob. 28ECh. 2.4 - Prob. 29ECh. 2.4 - Consider the equation...Ch. 2.4 - Prob. 31ECh. 2.4 - Prob. 32ECh. 2.4 - Prob. 33ECh. 2.4 - Prob. 34ECh. 2.4 - Prob. 35ECh. 2.4 - Prob. 36ECh. 2.5 - Prob. 1ECh. 2.5 - Prob. 2ECh. 2.5 - Prob. 3ECh. 2.5 - Prob. 4ECh. 2.5 - Prob. 5ECh. 2.5 - Prob. 6ECh. 2.5 - In Problems 7-12, solve the equation....Ch. 2.5 - In Problems 7-12, solve the equation....Ch. 2.5 - In Problems 7-12, solve the equation....Ch. 2.5 - In Problems 7-12, solve the equation....Ch. 2.5 - In Problems 7-12, solve the equation....Ch. 2.5 - In Problems 7-12, solve the equation....Ch. 2.5 - Prob. 13ECh. 2.5 - Prob. 14ECh. 2.5 - Prob. 15ECh. 2.5 - Prob. 16ECh. 2.5 - Prob. 17ECh. 2.5 - Prob. 18ECh. 2.5 - Prob. 19ECh. 2.5 - Prob. 20ECh. 2.6 - Prob. 1ECh. 2.6 - Prob. 2ECh. 2.6 - Prob. 3ECh. 2.6 - Prob. 4ECh. 2.6 - In Problems 1 -8, identify do not solve the...Ch. 2.6 - In Problems 1 -8, identify do not solve the...Ch. 2.6 - Prob. 7ECh. 2.6 - In Problems 1 -8, identify do not solve the...Ch. 2.6 - Prob. 9ECh. 2.6 - Use the method discussed under Homogeneous...Ch. 2.6 - Prob. 11ECh. 2.6 - Prob. 12ECh. 2.6 - Prob. 13ECh. 2.6 - Prob. 14ECh. 2.6 - Prob. 15ECh. 2.6 - Prob. 16ECh. 2.6 - Prob. 17ECh. 2.6 - Prob. 18ECh. 2.6 - Prob. 19ECh. 2.6 - Use the method discussed under Equations of the...Ch. 2.6 - Prob. 21ECh. 2.6 - Prob. 22ECh. 2.6 - Prob. 23ECh. 2.6 - Prob. 24ECh. 2.6 - Prob. 25ECh. 2.6 - Prob. 26ECh. 2.6 - Prob. 27ECh. 2.6 - Prob. 28ECh. 2.6 - Prob. 29ECh. 2.6 - Prob. 30ECh. 2.6 - Use the method discussed under Equations with...Ch. 2.6 - Use method discussed under Equation with Linear...Ch. 2.6 - Prob. 33ECh. 2.6 - Prob. 34ECh. 2.6 - Prob. 35ECh. 2.6 - Prob. 36ECh. 2.6 - Prob. 37ECh. 2.6 - Prob. 38ECh. 2.6 - Prob. 39ECh. 2.6 - Prob. 40ECh. 2.6 - Prob. 41ECh. 2.6 - Prob. 42ECh. 2.6 - Prob. 43ECh. 2.6 - Prob. 44ECh. 2.6 - Prob. 45ECh. 2.6 - Prob. 46ECh. 2.6 - Prob. 47ECh. 2.6 - Prob. 48ECh. 2.RP - Prob. 1RPCh. 2.RP - Prob. 2RPCh. 2.RP - Prob. 3RPCh. 2.RP - Prob. 4RPCh. 2.RP - Prob. 5RPCh. 2.RP - Prob. 6RPCh. 2.RP - Prob. 7RPCh. 2.RP - Prob. 8RPCh. 2.RP - Prob. 9RPCh. 2.RP - Prob. 10RPCh. 2.RP - Prob. 11RPCh. 2.RP - Prob. 12RPCh. 2.RP - Prob. 13RPCh. 2.RP - Prob. 14RPCh. 2.RP - Prob. 15RPCh. 2.RP - Prob. 16RPCh. 2.RP - Prob. 17RPCh. 2.RP - Prob. 18RPCh. 2.RP - Prob. 19RPCh. 2.RP - Prob. 20RPCh. 2.RP - Prob. 21RPCh. 2.RP - In Problem 1-30, solve the equation....Ch. 2.RP - Prob. 23RPCh. 2.RP - Prob. 24RPCh. 2.RP - Prob. 25RPCh. 2.RP - Prob. 26RPCh. 2.RP - In Problems 1-30, solve the equation....Ch. 2.RP - Prob. 28RPCh. 2.RP - Prob. 29RPCh. 2.RP - Prob. 30RPCh. 2.RP - Prob. 31RPCh. 2.RP - Prob. 32RPCh. 2.RP - In Problems 31-40, solve the initial value problem...Ch. 2.RP - Prob. 34RPCh. 2.RP - Prob. 35RPCh. 2.RP - Prob. 36RPCh. 2.RP - Prob. 37RPCh. 2.RP - Prob. 38RPCh. 2.RP - Prob. 39RPCh. 2.RP - Prob. 40RPCh. 2.RP - Prob. 41RP
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