Elementary Differential Equations
10th Edition
ISBN: 9780470458327
Author: William E. Boyce, Richard C. DiPrima
Publisher: Wiley, John & Sons, Incorporated
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Chapter 4.1, Problem 6P
To determine
The intervals in which solutions are sure to exist for the
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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
Chapter 4 Solutions
Elementary Differential Equations
Ch. 4.1 - In each of Problems 1 through 6, determine...Ch. 4.1 - In each of Problems 1 through 6, determine...Ch. 4.1 - In each of Problems 1 through 6, determine...Ch. 4.1 - In each of Problems 1 through 6, determine...Ch. 4.1 - In each of Problems 1 through 6, determine...Ch. 4.1 - Prob. 6PCh. 4.1 - In each of Problems 7 through 10, determine...Ch. 4.1 - Prob. 8PCh. 4.1 - In each of Problems 7 through 10, determine...Ch. 4.1 - Prob. 10P
Ch. 4.1 - In each of Problems 11 through 16, verify that the...Ch. 4.1 - In each of Problems 11 through 16, verify that the...Ch. 4.1 - In each of Problems 11 through 16, verify that the...Ch. 4.1 - In each of Problems 11 through 16, verify that the...Ch. 4.1 - In each of Problems 11 through 16, verify that the...Ch. 4.1 - In each of Problems 11 through 16, verify that the...Ch. 4.1 - Prob. 17PCh. 4.1 - Prob. 18PCh. 4.1 - Prob. 19PCh. 4.1 - Prob. 20PCh. 4.1 - Prob. 21PCh. 4.1 - Prob. 22PCh. 4.1 - Prob. 23PCh. 4.1 - Prob. 24PCh. 4.1 - Prob. 25PCh. 4.1 - Prob. 26PCh. 4.1 - Prob. 27PCh. 4.1 - Prob. 28PCh. 4.2 - In each of Problems 1 through 6, express the given...Ch. 4.2 - In each of Problems 1 through 6, express the given...Ch. 4.2 - In each of Problems 1 through 6, express the given...Ch. 4.2 - In each of Problems 1 through 6, express the given...Ch. 4.2 - In each of Problems 1 through 6, express the given...Ch. 4.2 - In each of Problems 1 through 6, express the given...Ch. 4.2 - Prob. 7PCh. 4.2 - Prob. 8PCh. 4.2 - Prob. 9PCh. 4.2 - Prob. 10PCh. 4.2 - In each of Problems 11 through 28, find the...Ch. 4.2 - In each of Problems 11 through 28, find the...Ch. 4.2 - In each of Problems 11 through 28, find the...Ch. 4.2 - In each of Problems 11 through 28, find the...Ch. 4.2 - Prob. 15PCh. 4.2 - Prob. 16PCh. 4.2 - Prob. 17PCh. 4.2 - Prob. 18PCh. 4.2 - Prob. 19PCh. 4.2 - In each of Problems 11 through 28, find the...Ch. 4.2 - In each of Problems 11 through 28, find the...Ch. 4.2 - In each of Problems 11 through 28, find the...Ch. 4.2 - In each of Problems 11 through 28, find the...Ch. 4.2 - In each of Problems 11 through 28, find the...Ch. 4.2 - In each of Problems 11 through 28, find the...Ch. 4.2 - In each of Problems 11 through 28, find the...Ch. 4.2 - In each of Problems 11 through 28, find the...Ch. 4.2 - In each of Problems 11 through 28, find the...Ch. 4.2 - In each of Problems 29 through 36, find the...Ch. 4.2 - Prob. 31PCh. 4.2 - Prob. 32PCh. 4.2 - Prob. 33PCh. 4.2 - Prob. 34PCh. 4.2 - Prob. 35PCh. 4.2 - Prob. 36PCh. 4.2 - Prob. 37PCh. 4.2 - Prob. 38PCh. 4.2 - Prob. 39PCh. 4.2 - Prob. 40PCh. 4.3 - In each of Problems 1 through 8, determine the...Ch. 4.3 - In each of Problems 1 through 8, determine the...Ch. 4.3 - In each of Problems 1 through 8, determine the...Ch. 4.3 - In each of Problems 1 through 8, determine the...Ch. 4.3 - In each of Problems 1 through 8, determine the...Ch. 4.3 - In each of Problems 1 through 8, determine the...Ch. 4.3 - In each of Problems 1 through 8, determine the...Ch. 4.3 - In each of Problems 1 through 8, determine the...Ch. 4.3 - In each of Problems 9 through 12, find the...Ch. 4.3 - In each of Problems 9 through 12, find the...Ch. 4.3 - In each of Problems 9 through 12, find the...Ch. 4.3 - In each of Problems 9 through 12, find the...Ch. 4.3 - In each of Problems 13 through 18, determine a...Ch. 4.3 - In each of Problems 13 through 18, determine a...Ch. 4.3 - In each of Problems 13 through 18, determine a...Ch. 4.3 - In each of Problems 13 through 18, determine a...Ch. 4.3 - In each of Problems 13 through 18, determine a...Ch. 4.3 - In each of Problems 13 through 18, determine a...Ch. 4.3 - Prob. 19PCh. 4.3 - Show that linear differential operators with...Ch. 4.4 - Prob. 1PCh. 4.4 - In each of Problems 1 through 6, use the method of...Ch. 4.4 - In each of Problems 1 through 6, use the method of...Ch. 4.4 - In each of Problems 1 through 6, use the method of...Ch. 4.4 - In each of Problems 1 through 6, use the method of...Ch. 4.4 - In each of Problems 1 through 6, use the method of...Ch. 4.4 - In each of Problems 7 and 8, find the general...Ch. 4.4 - In each of Problems 7 and 8, find the general...Ch. 4.4 - In each of Problems 9 through 12, find the...Ch. 4.4 - In each of Problems 9 through 12, find the...Ch. 4.4 - In each of Problems 9 through 12, find the...Ch. 4.4 - In each of Problems 9 through 12, find the...Ch. 4.4 - Given that x, x2, and 1/x are solutions of the...Ch. 4.4 - Find a formula involving integrals for a...Ch. 4.4 - Find a formula involving integrals for a...Ch. 4.4 - Find a formula involving integrals for a...Ch. 4.4 - Find a formula involving integrals for a...
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- 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.arrow_forwardQ/ Find the region where ODES has no limit cycle: -X = X + X3 y=x+y+y'arrow_forwardB:Show that the function 4H(x,y)= (x² + y2)2-2((x² + y²) is a first integral of ODES: x=y + y(x² + y²) y=x+x (x² + y²) and sketch the stability of critical points and draw the phase portrait of system.arrow_forward
- A: Show that the ODES has no limit cycle in a region D and find this region: x=y-2x³ y=x+y-2y3 Carrow_forwardoptımızatıon theoryarrow_forwardQ3)A: Given H(x,y)= x²-x4 + y² as a first integral of an ODEs, find this ODES corresponding to H(x,y) and show the phase portrait by using Hartman theorem and by drawing graph of H(x,y)=c. Discuss the stability of critical points of the corresponding ODEs.arrow_forward
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