
Elementary Differential Equations
10th Edition
ISBN: 9780470458327
Author: William E. Boyce, Richard C. DiPrima
Publisher: Wiley, John & Sons, Incorporated
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Question
Chapter 3.3, Problem 25P
(a)
To determine
The solution of the initial value problem,
(b)
To determine
The value of
(c)
To determine
The smallest value of t, in terms of
(d)
To determine
The limit of the expression,
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4. Consider Chebychev's equation
(1 - x²)y" - xy + λy = 0
with boundary conditions y(-1) = 0 and y(1) = 0, where X is a constant.
(a) Show that Chebychev's equation can be expressed in Sturm-Liouville form
d
· (py') + qy + Ary = 0,
dx
y(1) = 0, y(-1) = 0,
where p(x) = (1 = x²) 1/2, q(x) = 0 and r(x) = (1 − x²)-1/2
(b) Show that the eigenfunctions of the Sturm-Liouville equation are extremals of the
functional A[y], where
A[y]
=
I[y]
J[y]'
and I[y] and [y] are defined by
-
I [y] = √, (my² — qy²) dx
and
J[y] = [[", ry² dx.
Explain briefly how to use this to obtain estimates of the smallest eigenvalue >1.
1
(c) Let k > be a parameter. Explain why the functions y(x) = (1-x²) are suitable
4
trial functions for estimating the smallest eigenvalue. Show that the value of A[y]
for these trial functions is
4k2
A[y] =
=
4k - 1'
and use this to estimate the smallest eigenvalue \1.
Hint:
L₁ x²(1 − ²)³¹ dr =
1
(1 - x²)³ dx
(ẞ > 0).
2ẞ
You recieve a case of fresh Michigan cherries that weighs 8.2 kg. You will be making cherry pies. Each pie will require 1 3/4 pounds of pitted cherries. How many pies can be made from the case if the yield percent for cherries is 87
Q/ show that the system:
x = Y + x(x² + y²)
y° =
=x+y (x² + y²)
9
X=-x(x²+ y²)
9 X
Y° = x - y (x² + y²)
have the same lin car part at (0,0) but they are topologically
different. Give the reason.
Chapter 3 Solutions
Elementary Differential Equations
Ch. 3.1 - In each of Problems 1 through 8, find the general...Ch. 3.1 - In each of Problems 1 through 8, find the general...Ch. 3.1 - In each of Problems 1 through 8, find the general...Ch. 3.1 - In each of Problems 1 through 8, find the general...Ch. 3.1 - In each of Problems 1 through 8, find the general...Ch. 3.1 - In each of Problems 1 through 8, find the general...Ch. 3.1 - In each of Problems 1 through 8, find the general...Ch. 3.1 - In each of Problems 1 through 8, find the general...Ch. 3.1 - In each of Problems 9 through 16, find the...Ch. 3.1 - In each of Problems 9 through 16, find the...
Ch. 3.1 - In each of Problems 9 through 16, find the...Ch. 3.1 - Prob. 12PCh. 3.1 - Prob. 13PCh. 3.1 - Prob. 14PCh. 3.1 - In each of Problems 9 through 16, find the...Ch. 3.1 - Prob. 16PCh. 3.1 - Prob. 17PCh. 3.1 - Prob. 18PCh. 3.1 - Prob. 19PCh. 3.1 - Prob. 20PCh. 3.1 - Solve the initial value problem y″ − y′ − 2y = 0,...Ch. 3.1 - Solve the initial value problem 4y″ − y = 0, y(0)...Ch. 3.1 - Prob. 23PCh. 3.1 - Prob. 24PCh. 3.1 - Prob. 25PCh. 3.1 - Prob. 26PCh. 3.1 - Prob. 27PCh. 3.1 - Prob. 28PCh. 3.2 - In each of Problems 1 through 6, find the...Ch. 3.2 - In each of Problems 1 through 6, find the...Ch. 3.2 - In each of Problems 1 through 6, find the...Ch. 3.2 - In each of Problems 1 through 6, find the...Ch. 3.2 - In each of Problems 1 through 6, find the...Ch. 3.2 - In each of Problems 1 through 6, find the...Ch. 3.2 - In each of Problems 7 through 12, determine the...Ch. 3.2 - In each of Problems 7 through 12, determine the...Ch. 3.2 - In each of Problems 7 through 12, determine the...Ch. 3.2 - In each of Problems 7 through 12, determine the...Ch. 3.2 - In each of Problems 7 through 12, determine the...Ch. 3.2 - In each of Problems 7 through 12, determine the...Ch. 3.2 - Verify that y1(t) = t2 and y2(t) = t−1 are two...Ch. 3.2 - Verify that y1(t) = 1 and y2(t) = t1/2 are...Ch. 3.2 - Show that if y = φ(t) is a solution of the...Ch. 3.2 - Can y = sin(t2) be a solution on an interval...Ch. 3.2 - If the Wronskian W of f and g is 3e4t, and if f(t)...Ch. 3.2 - Prob. 18PCh. 3.2 - If W(f, g) is the Wronskian of f and g, and if u =...Ch. 3.2 - If the Wronskian of f and g is t cos t − sin t,...Ch. 3.2 - Assume that y1 and y2 are a fundamental set of...Ch. 3.2 - Prob. 22PCh. 3.2 - Prob. 23PCh. 3.2 - Prob. 24PCh. 3.2 - Prob. 25PCh. 3.2 - Prob. 26PCh. 3.2 - Prob. 27PCh. 3.2 - Prob. 28PCh. 3.2 - Prob. 29PCh. 3.2 - Prob. 30PCh. 3.2 - Prob. 31PCh. 3.2 - Prob. 32PCh. 3.2 - Prob. 33PCh. 3.2 - Prob. 34PCh. 3.2 - Prob. 35PCh. 3.2 - If the Wronskian of any two solutions of y″ +...Ch. 3.2 - Prob. 37PCh. 3.2 - Prob. 38PCh. 3.2 - Prob. 39PCh. 3.2 - Prob. 40PCh. 3.2 - Prob. 41PCh. 3.2 - Prob. 42PCh. 3.2 - Prob. 43PCh. 3.2 - Prob. 44PCh. 3.2 - Prob. 45PCh. 3.2 - Prob. 46PCh. 3.2 - Prob. 47PCh. 3.2 - Prob. 48PCh. 3.2 - Prob. 49PCh. 3.2 - Prob. 50PCh. 3.2 - Prob. 51PCh. 3.3 - In each of Problems 1 through 6, use Euler’s...Ch. 3.3 - In each of Problems 1 through 6, use Euler’s...Ch. 3.3 - In each of Problems 1 through 6, use Euler’s...Ch. 3.3 - In each of Problems 1 through 6, use Euler’s...Ch. 3.3 - In each of Problems 1 through 6, use Euler’s...Ch. 3.3 - In each of Problems 1 through 6, use Euler’s...Ch. 3.3 - In each of Problems 7 through 16, find the general...Ch. 3.3 - In each of Problems 7 through 16, find the general...Ch. 3.3 - In each of Problems 7 through 16, find the general...Ch. 3.3 - In each of Problems 7 through 16, find the general...Ch. 3.3 - Prob. 11PCh. 3.3 - Prob. 12PCh. 3.3 - In each of Problems 7 through 16, find the general...Ch. 3.3 - Prob. 14PCh. 3.3 - Prob. 15PCh. 3.3 - Prob. 16PCh. 3.3 - Prob. 17PCh. 3.3 - Prob. 18PCh. 3.3 - Prob. 19PCh. 3.3 - Prob. 20PCh. 3.3 - In each of Problems 17 through 22, find the...Ch. 3.3 - In each of Problems 17 through 22, find the...Ch. 3.3 - Prob. 23PCh. 3.3 - Prob. 24PCh. 3.3 - Prob. 25PCh. 3.3 - Prob. 26PCh. 3.3 - Prob. 27PCh. 3.3 - Prob. 28PCh. 3.3 - Prob. 29PCh. 3.3 - Prob. 30PCh. 3.3 - Prob. 31PCh. 3.3 - Prob. 32PCh. 3.3 - Prob. 33PCh. 3.3 - Prob. 34PCh. 3.3 - Prob. 35PCh. 3.3 - Prob. 36PCh. 3.3 - Prob. 37PCh. 3.3 - Prob. 38PCh. 3.3 - Prob. 39PCh. 3.3 - Prob. 40PCh. 3.3 - Prob. 41PCh. 3.3 - Prob. 42PCh. 3.3 - Prob. 43PCh. 3.3 - Prob. 44PCh. 3.3 - Prob. 45PCh. 3.3 - Prob. 46PCh. 3.4 - In each of Problems 1 through 10, find the general...Ch. 3.4 - Prob. 2PCh. 3.4 - Prob. 3PCh. 3.4 - Prob. 4PCh. 3.4 - Prob. 5PCh. 3.4 - Prob. 6PCh. 3.4 - Prob. 7PCh. 3.4 - Prob. 8PCh. 3.4 - Prob. 9PCh. 3.4 - Prob. 10PCh. 3.4 - In each of Problems 11 through 14, solve the given...Ch. 3.4 - Prob. 12PCh. 3.4 - Prob. 13PCh. 3.4 - Prob. 14PCh. 3.4 - Prob. 15PCh. 3.4 - Prob. 16PCh. 3.4 - Prob. 17PCh. 3.4 - Consider the initial value problem
9y″ + 12y′ + 4y...Ch. 3.4 - Prob. 19PCh. 3.4 - Prob. 20PCh. 3.4 - Prob. 21PCh. 3.4 - Prob. 22PCh. 3.4 - Prob. 23PCh. 3.4 - Prob. 24PCh. 3.4 - Prob. 25PCh. 3.4 - Prob. 26PCh. 3.4 - Prob. 27PCh. 3.4 - Prob. 28PCh. 3.4 - Prob. 29PCh. 3.4 - Prob. 30PCh. 3.4 - Prob. 31PCh. 3.4 - The method of Problem 20 can be extended to second...Ch. 3.4 - In each of Problems 33 through 36, use the method...Ch. 3.4 - Prob. 34PCh. 3.4 - Prob. 35PCh. 3.4 - Prob. 36PCh. 3.4 - Prob. 37PCh. 3.4 - Prob. 38PCh. 3.4 - Prob. 39PCh. 3.4 - Euler Equations. In each of Problems 40 through...Ch. 3.4 - Prob. 41PCh. 3.4 - Prob. 42PCh. 3.4 - Prob. 43PCh. 3.4 - Prob. 44PCh. 3.4 - Prob. 45PCh. 3.5 - In each of Problems 1 through 14, find the general...Ch. 3.5 - In each of Problems 1 through 14, find the general...Ch. 3.5 - In each of Problems 1 through 14, find the general...Ch. 3.5 - Prob. 4PCh. 3.5 - Prob. 5PCh. 3.5 - Prob. 6PCh. 3.5 - Prob. 7PCh. 3.5 - In each of Problems 1 through 14, find the general...Ch. 3.5 - Prob. 9PCh. 3.5 - Prob. 10PCh. 3.5 - In each of Problems 1 through 14, find the general...Ch. 3.5 - Prob. 12PCh. 3.5 - Prob. 13PCh. 3.5 - Prob. 14PCh. 3.5 - Prob. 15PCh. 3.5 - Prob. 16PCh. 3.5 - In each of Problems 15 through 20, find the...Ch. 3.5 - Prob. 18PCh. 3.5 - Prob. 19PCh. 3.5 - Prob. 20PCh. 3.5 - Prob. 29PCh. 3.5 - Prob. 30PCh. 3.5 - Prob. 31PCh. 3.5 - Prob. 32PCh. 3.5 - Prob. 33PCh. 3.5 - Prob. 34PCh. 3.5 - Prob. 35PCh. 3.5 - Prob. 36PCh. 3.5 - Prob. 37PCh. 3.5 - Prob. 38PCh. 3.5 - Prob. 39PCh. 3.6 - In each of Problems 1 through 4, use the method of...Ch. 3.6 - Prob. 2PCh. 3.6 - Prob. 3PCh. 3.6 - Prob. 4PCh. 3.6 - Prob. 5PCh. 3.6 - Prob. 6PCh. 3.6 - Prob. 7PCh. 3.6 - Prob. 8PCh. 3.6 - Prob. 9PCh. 3.6 - Prob. 10PCh. 3.6 - Prob. 11PCh. 3.6 - Prob. 12PCh. 3.6 - Prob. 13PCh. 3.6 - Prob. 14PCh. 3.6 - Prob. 15PCh. 3.6 - Prob. 16PCh. 3.6 - Prob. 17PCh. 3.6 - Prob. 18PCh. 3.6 - Prob. 19PCh. 3.6 - Prob. 20PCh. 3.6 - Prob. 21PCh. 3.6 - Prob. 22PCh. 3.6 - Prob. 23PCh. 3.6 - Prob. 24PCh. 3.6 - Prob. 25PCh. 3.6 - Prob. 26PCh. 3.6 - Prob. 27PCh. 3.6 - Prob. 28PCh. 3.6 - Prob. 29PCh. 3.6 - Prob. 30PCh. 3.6 - Prob. 31PCh. 3.6 - Prob. 32PCh. 3.7 - In each of Problems 1 through 4, determine ω0, R,...Ch. 3.7 - Prob. 2PCh. 3.7 - Prob. 3PCh. 3.7 - Prob. 4PCh. 3.7 - Prob. 5PCh. 3.7 - Prob. 6PCh. 3.7 - Prob. 7PCh. 3.7 - Prob. 8PCh. 3.7 - Prob. 9PCh. 3.7 - Prob. 10PCh. 3.7 - Prob. 11PCh. 3.7 - Prob. 12PCh. 3.7 - Prob. 13PCh. 3.7 - Prob. 14PCh. 3.7 - Prob. 15PCh. 3.7 - Prob. 16PCh. 3.7 - Prob. 17PCh. 3.7 - Prob. 18PCh. 3.7 - Prob. 19PCh. 3.7 - Prob. 20PCh. 3.7 - Prob. 21PCh. 3.7 - Prob. 22PCh. 3.7 - Prob. 23PCh. 3.7 - Prob. 24PCh. 3.7 - Prob. 26PCh. 3.7 - Prob. 27PCh. 3.7 - Prob. 28PCh. 3.7 - Prob. 29PCh. 3.7 - Prob. 30PCh. 3.7 - Prob. 31PCh. 3.8 - Prob. 1PCh. 3.8 - Prob. 2PCh. 3.8 - Prob. 3PCh. 3.8 - Prob. 4PCh. 3.8 - Prob. 5PCh. 3.8 - Prob. 6PCh. 3.8 - Prob. 7PCh. 3.8 - Prob. 8PCh. 3.8 - Prob. 9PCh. 3.8 - Prob. 10PCh. 3.8 - Prob. 11PCh. 3.8 - Prob. 12PCh. 3.8 - Prob. 14PCh. 3.8 - Prob. 15PCh. 3.8 - Prob. 16P
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