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 6.3, Problem 1E
In Problems 1-4, use the method of undetermined coefficients to determine the form of a particular solution for the given equation.
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1. Find the solution set of In(x) sin(x) ≤ 0, for x = [0,14].
Suppose you are gambling on a roulette wheel. Each time the wheel is spun, the result is one of the outcomes 0, 1, and so on through 36. Of these outcomes, 18 are red, 18 are black, and 1 is green. On each spin you bet $5 that a red outcome will occur and $1 that the green outcome will occur. If red occurs, you win a net $4. (You win $10 from red and nothing from green.) If green occurs, you win a net $24. (You win $30 from green and nothing from red.) If black occurs, you lose everything you bet for a loss of $6.
a. Use simulation to generate 1,000 plays from this strategy. Each play should indicate the net amount won or lost. Then, based on these outcomes, calculate a 95% confidence interval for the total net amount won or lost from 1,000 plays of the game. (Round your answers to two decimal places and if your answer is negative value, enter "minus" sign.) I worked out the Upper Limit, but I can't seem to arrive at the correct answer for the Lower Limit. What is the Lower Limit?…
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
Chapter 6 Solutions
Fundamentals of Differential Equations and Boundary Value Problems
Ch. 6.1 - In Problems 1-6, determine the largest interval...Ch. 6.1 - In Problems 1-6, determine the largest interval...Ch. 6.1 - In Problems 1-6, determine the largest interval...Ch. 6.1 - In Problems 1-6, determine the largest interval...Ch. 6.1 - In Problems 1-6, determine the largest interval...Ch. 6.1 - In Problems 1-6, determine the largest interval...Ch. 6.1 - Prob. 7ECh. 6.1 - In Problems7-14, determine whether the given...Ch. 6.1 - In Problems7-14, determine whether the given...Ch. 6.1 - In Problems7-14, determine whether the given...
Ch. 6.1 - In Problems7-14, determine whether the given...Ch. 6.1 - In Problems7-14, determine whether the given...Ch. 6.1 - In Problems7-14, determine whether the given...Ch. 6.1 - In Problems7-14, determine whether the given...Ch. 6.1 - Using the Wronskian in Problems 15-18, verify that...Ch. 6.1 - Prob. 16ECh. 6.1 - Prob. 17ECh. 6.1 - Prob. 18ECh. 6.1 - In Problems 19-22, a particular solution and a...Ch. 6.1 - In Problems 19-22, a particular solution and a...Ch. 6.1 - In Problems 19-22, a particular solution and a...Ch. 6.1 - In Problems 19-22, a particular solution and a...Ch. 6.1 - Let L[y]:=y+y+xy, y1(x):=sinx, and y2(x):=x....Ch. 6.1 - Let L[y]:=yxy+4y3xy", y1(x)=cos2x, and y2(x):=1/3....Ch. 6.1 - Prob. 25ECh. 6.1 - Prob. 26ECh. 6.1 - Prob. 27ECh. 6.1 - Prob. 28ECh. 6.1 - Prob. 29ECh. 6.1 - Prob. 30ECh. 6.1 - Prob. 31ECh. 6.1 - Prob. 32ECh. 6.1 - Prob. 33ECh. 6.1 - Prob. 34ECh. 6.1 - Prob. 35ECh. 6.2 - In Problems 1-14, find a general solution for the...Ch. 6.2 - Prob. 2ECh. 6.2 - In Problems 1-14, find a general solution for the...Ch. 6.2 - Prob. 4ECh. 6.2 - Prob. 5ECh. 6.2 - Prob. 6ECh. 6.2 - Prob. 7ECh. 6.2 - Prob. 8ECh. 6.2 - Prob. 9ECh. 6.2 - Prob. 10ECh. 6.2 - Prob. 11ECh. 6.2 - Prob. 12ECh. 6.2 - Prob. 13ECh. 6.2 - In Problems 1-14, find a general solution for the...Ch. 6.2 - In Problems 15-18, find a general solution to the...Ch. 6.2 - Prob. 16ECh. 6.2 - In Problems 15 18, find a general solution to the...Ch. 6.2 - Prob. 18ECh. 6.2 - Prob. 19ECh. 6.2 - In Problems 1921, solve the given initial value...Ch. 6.2 - Prob. 21ECh. 6.2 - Prob. 22ECh. 6.2 - In Problems 22 and 23, find a general solution for...Ch. 6.2 - Prob. 24ECh. 6.2 - Prob. 25ECh. 6.2 - Prob. 26ECh. 6.2 - Prob. 27ECh. 6.2 - Find a general solution to y3yy=0 by using Newtons...Ch. 6.2 - Prob. 29ECh. 6.2 - Prob. 30ECh. 6.2 - Higher-Order Cauchy-Euler Equations. A...Ch. 6.2 - Prob. 32ECh. 6.2 - On a smooth horizontal surface, a mass of m1 kg is...Ch. 6.2 - Suppose the two springs in the coupled mass-spring...Ch. 6.2 - Vibrating Beam. In studying the transverse...Ch. 6.3 - In Problems 1-4, use the method of undetermined...Ch. 6.3 - Prob. 2ECh. 6.3 - Prob. 3ECh. 6.3 - Prob. 4ECh. 6.3 - In Problems 5-10, find a general solution to the...Ch. 6.3 - In Problems 5-10, find a general solution to the...Ch. 6.3 - Prob. 7ECh. 6.3 - Prob. 8ECh. 6.3 - Prob. 9ECh. 6.3 - In Problems 5-10, find a general solution to the...Ch. 6.3 - In Problems 11-20, find a differential operator...Ch. 6.3 - In Problems 11-20, find a differential operator...Ch. 6.3 - In Problems 11-20, find a differential operator...Ch. 6.3 - In Problems 11-20, find a differential operator...Ch. 6.3 - In Problems 11-20, find a differential operator...Ch. 6.3 - In Problems 11-20, find a differential operator...Ch. 6.3 - In Problems 11-20, find a differential operator...Ch. 6.3 - In Problems 11-20, find a differential operator...Ch. 6.3 - In Problems 11-20, find a differential operator...Ch. 6.3 - In Problems 11-20, find a differential operator...Ch. 6.3 - In Problems 21-30, use the annihilator method to...Ch. 6.3 - In Problems 21-30, use the annihilator method to...Ch. 6.3 - In Problems 21-30, use the annihilator method to...Ch. 6.3 - In Problems 21-30, use the annihilator method to...Ch. 6.3 - In Problems 21-30, use the annihilator method to...Ch. 6.3 - In Problems 21-30, use the annihilator method to...Ch. 6.3 - In Problems 21-30, use the annihilator method to...Ch. 6.3 - Prob. 28ECh. 6.3 - Prob. 29ECh. 6.3 - In Problems 21-30, use the annihilator method to...Ch. 6.3 - Prob. 31ECh. 6.3 - Prob. 32ECh. 6.3 - In Problems 31-33, solve the given initial value...Ch. 6.3 - Prob. 34ECh. 6.3 - Prob. 35ECh. 6.3 - Use the annihilator method to show that if f(x) in...Ch. 6.3 - Prob. 37ECh. 6.3 - In Problems 38 and 39, use the elimination method...Ch. 6.3 - Prob. 39ECh. 6.4 - In Problems 1-6, use the method of variation of...Ch. 6.4 - Prob. 2ECh. 6.4 - In Problems 1-6, use the method of variation of...Ch. 6.4 - Prob. 4ECh. 6.4 - Prob. 5ECh. 6.4 - In Problems 1-6, use the method of variation of...Ch. 6.4 - Prob. 7ECh. 6.4 - Prob. 8ECh. 6.4 - Prob. 9ECh. 6.4 - Given that {x,x1,x4} is a fundamental solution set...Ch. 6.4 - Prob. 11ECh. 6.4 - Prob. 12ECh. 6.4 - Prob. 13ECh. 6.4 - Prob. 14ECh. 6.RP - Determine the intervals for which Theorem 1 on...Ch. 6.RP - Determine whether the given functions are linearly...Ch. 6.RP - Show that the set of functions...Ch. 6.RP - Find a general solution for the given differential...Ch. 6.RP - Find a general solution for the homogeneous linear...Ch. 6.RP - Prob. 6RPCh. 6.RP - Prob. 7RPCh. 6.RP - Use the annihilator method to determine the form...Ch. 6.RP - Find a general solution to the Cauchy-Euler...Ch. 6.RP - Find a general solution to the given Cauchy-Euler...
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