Elementary Differential Equations
10th Edition
ISBN: 9780470458327
Author: William E. Boyce, Richard C. DiPrima
Publisher: Wiley, John & Sons, Incorporated
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Chapter 2.2, Problem 29P
To determine
To solve: The
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(b) Let I[y] be a functional of y(x) defined by
[[y] = √(x²y' + 2xyy' + 2xy + y²) dr,
subject to boundary conditions
y(0) = 0,
y(1) = 1.
State the Euler-Lagrange equation for finding extreme values of I [y] for this prob-
lem. Explain why the function y(x) = x is an extremal, and for this function,
show that I = 2. Without doing further calculations, give the values of I for the
functions y(x) = x² and y(x) = x³.
Please use mathematical induction to prove this
L
sin 2x (1+ cos 3x) dx
59
Chapter 2 Solutions
Elementary Differential Equations
Ch. 2.1 - In each of Problems 1 through 12:
Draw a direction...Ch. 2.1 - In each of Problems 1 through 12:
Draw a direction...Ch. 2.1 - Prob. 3PCh. 2.1 - Prob. 4PCh. 2.1 - Prob. 5PCh. 2.1 - Prob. 6PCh. 2.1 - In each of Problems 1 through 12:
Draw a direction...Ch. 2.1 - Prob. 8PCh. 2.1 - Prob. 9PCh. 2.1 - Prob. 10P
Ch. 2.1 - In each of Problems 1 through 12:
Draw a direction...Ch. 2.1 - In each of Problems 1 through 12:
Draw a direction...Ch. 2.1 - Prob. 13PCh. 2.1 - Prob. 14PCh. 2.1 - In each of Problems 13 through 20, find the...Ch. 2.1 - Prob. 16PCh. 2.1 - Prob. 17PCh. 2.1 - Prob. 18PCh. 2.1 - In each of Problems 13 through 20, find the...Ch. 2.1 - Prob. 20PCh. 2.1 - In each of Problems 21 through 23:
Draw a...Ch. 2.1 - In each of Problems 21 through 23:
Draw a...Ch. 2.1 - In each of Problems 21 through 23:
Draw a...Ch. 2.1 - Prob. 24PCh. 2.1 - Prob. 25PCh. 2.1 - Prob. 26PCh. 2.1 - Prob. 27PCh. 2.1 - Prob. 28PCh. 2.1 - Consider the initial value problem
Find the...Ch. 2.1 - Prob. 30PCh. 2.1 - Prob. 31PCh. 2.1 - Show that all solutions of 2y′ + ty = 2 [Eq. (41)...Ch. 2.1 - Show that if a and λ are positive constants, and b...Ch. 2.1 - Prob. 34PCh. 2.1 - Prob. 35PCh. 2.1 - Prob. 36PCh. 2.1 - Prob. 37PCh. 2.1 - Prob. 38PCh. 2.1 - Prob. 39PCh. 2.1 - Prob. 40PCh. 2.1 - Prob. 41PCh. 2.1 - Prob. 42PCh. 2.2 - In each of Problems 1 through 8, solve the given...Ch. 2.2 - In each of Problems 1 through 8, solve the given...Ch. 2.2 - In each of Problems 1 through 8, solve the given...Ch. 2.2 - In each of Problems 1 through 8, solve the given...Ch. 2.2 - In each of Problems 1 through 8, solve the given...Ch. 2.2 - In each of Problems 1 through 8, solve the given...Ch. 2.2 - In each of Problems 1 through 8, solve the given...Ch. 2.2 - In each of Problems 1 through 8, solve the given...Ch. 2.2 - In each of Problems 9 through 20:
Find the...Ch. 2.2 - Prob. 10PCh. 2.2 - In each of Problems 9 through 20:
Find the...Ch. 2.2 - Prob. 12PCh. 2.2 - Prob. 13PCh. 2.2 - Prob. 14PCh. 2.2 - In each of Problems 9 through 20:
Find the...Ch. 2.2 - Prob. 16PCh. 2.2 - In each of Problems 9 through 20:
Find the...Ch. 2.2 - In each of Problems 9 through 20:
Find the...Ch. 2.2 - Prob. 19PCh. 2.2 - Prob. 20PCh. 2.2 - Prob. 21PCh. 2.2 - Prob. 22PCh. 2.2 - Prob. 23PCh. 2.2 - Solve the initial value problem
y′ = (2 − ex)/(3 +...Ch. 2.2 - Prob. 25PCh. 2.2 - Prob. 26PCh. 2.2 - Prob. 27PCh. 2.2 - Prob. 28PCh. 2.2 - Prob. 29PCh. 2.2 - Prob. 30PCh. 2.2 - Prob. 31PCh. 2.2 - The method outlined in Problem 30 can be used for...Ch. 2.2 - Prob. 33PCh. 2.2 - Prob. 34PCh. 2.2 - The method outlined in Problem 30 can be used for...Ch. 2.2 - The method outlined in Problem 30 can be used for...Ch. 2.2 - The method outlined in Problem 30 can be used for...Ch. 2.2 - The method outlined in Problem 30 can be used for...Ch. 2.3 - Consider a tank used in certain hydrodynamic...Ch. 2.3 - A tank initially contains 120 L of pure water. A...Ch. 2.3 - A tank originally contains 100 gal of fresh water....Ch. 2.3 - A tank with a capacity of 500 gal originally...Ch. 2.3 - Prob. 5PCh. 2.3 - Prob. 6PCh. 2.3 - Prob. 7PCh. 2.3 - Prob. 8PCh. 2.3 - Prob. 9PCh. 2.3 - A home buyer can afford to spend no more than...Ch. 2.3 - A home buyer wishes to borrow $250,000 at an...Ch. 2.3 - A recent college graduate borrows $150,000 at an...Ch. 2.3 - An important tool in archeological research is...Ch. 2.3 - Suppose that a certain population has a growth...Ch. 2.3 - Suppose that a certain population satisfies the...Ch. 2.3 - Newton’s law of cooling states that the...Ch. 2.3 - Prob. 17PCh. 2.3 - Prob. 18PCh. 2.3 - Prob. 19PCh. 2.3 - A ball with mass 0.15 kg is thrown upward with...Ch. 2.3 - Assume that the conditions are as in Problem 20...Ch. 2.3 - Prob. 22PCh. 2.3 - Prob. 23PCh. 2.3 - Prob. 24PCh. 2.3 - Prob. 25PCh. 2.3 - Prob. 26PCh. 2.3 - Prob. 27PCh. 2.3 - Prob. 28PCh. 2.3 - Prob. 29PCh. 2.3 - Prob. 30PCh. 2.3 - Prob. 31PCh. 2.3 - Prob. 32PCh. 2.4 - Prob. 1PCh. 2.4 - Prob. 2PCh. 2.4 - Prob. 3PCh. 2.4 - Prob. 4PCh. 2.4 - Prob. 5PCh. 2.4 - Prob. 6PCh. 2.4 - Prob. 7PCh. 2.4 - Prob. 8PCh. 2.4 - Prob. 9PCh. 2.4 - Prob. 10PCh. 2.4 - Prob. 11PCh. 2.4 - Prob. 12PCh. 2.4 - Prob. 13PCh. 2.4 - Prob. 14PCh. 2.4 - Prob. 15PCh. 2.4 - Prob. 16PCh. 2.4 - Prob. 17PCh. 2.4 - Prob. 18PCh. 2.4 - Prob. 19PCh. 2.4 - Prob. 20PCh. 2.4 - Prob. 21PCh. 2.4 - Prob. 22PCh. 2.4 - Prob. 23PCh. 2.4 - Prob. 24PCh. 2.4 - Prob. 25PCh. 2.4 - Prob. 26PCh. 2.4 - Prob. 27PCh. 2.4 - Prob. 28PCh. 2.4 - Prob. 29PCh. 2.4 - Prob. 30PCh. 2.4 - Prob. 31PCh. 2.4 - Prob. 32PCh. 2.4 - Prob. 33PCh. 2.5 - Prob. 1PCh. 2.5 - Prob. 2PCh. 2.5 - Prob. 3PCh. 2.5 - Prob. 4PCh. 2.5 - Prob. 5PCh. 2.5 - Prob. 6PCh. 2.5 - Prob. 7PCh. 2.5 - Prob. 8PCh. 2.5 - Prob. 9PCh. 2.5 - Prob. 10PCh. 2.5 - Prob. 11PCh. 2.5 - Prob. 12PCh. 2.5 - Prob. 13PCh. 2.5 - Prob. 14PCh. 2.5 - Prob. 15PCh. 2.5 - Prob. 16PCh. 2.5 - Prob. 17PCh. 2.5 - Prob. 18PCh. 2.5 - Prob. 19PCh. 2.5 - Prob. 20PCh. 2.5 - Prob. 21PCh. 2.5 - Prob. 22PCh. 2.5 - Prob. 23PCh. 2.5 - Prob. 24PCh. 2.5 - Prob. 25PCh. 2.5 - Prob. 26PCh. 2.5 - Prob. 27PCh. 2.5 - Prob. 28PCh. 2.6 - Determine whether each of the equations in...Ch. 2.6 - Prob. 2PCh. 2.6 - Prob. 3PCh. 2.6 - Determine whether each of the equations in...Ch. 2.6 - Prob. 5PCh. 2.6 - Prob. 6PCh. 2.6 - Prob. 7PCh. 2.6 - Prob. 8PCh. 2.6 - Prob. 9PCh. 2.6 - Prob. 10PCh. 2.6 - Determine whether each of the equations in...Ch. 2.6 - Determine whether each of the equations in...Ch. 2.6 - Prob. 13PCh. 2.6 - Prob. 14PCh. 2.6 - Prob. 15PCh. 2.6 - Prob. 16PCh. 2.6 - Prob. 17PCh. 2.6 - Prob. 18PCh. 2.6 - Prob. 19PCh. 2.6 - Prob. 20PCh. 2.6 - Prob. 21PCh. 2.6 - Prob. 22PCh. 2.6 - Prob. 23PCh. 2.6 - Show that if (Nx – My)/(xM – yN) = R, where R...Ch. 2.6 - In each of Problems 25 through 31, find an...Ch. 2.6 - In each of Problems 25 through 31, find an...Ch. 2.6 - Prob. 27PCh. 2.6 - Prob. 28PCh. 2.6 - Prob. 29PCh. 2.6 - In each of Problems 25 through 31, find an...Ch. 2.6 - In each of Problems 25 through 31, find an...Ch. 2.6 - Prob. 32PCh. 2.7 - In each of Problems 1 through 4:
Find approximate...Ch. 2.7 - Prob. 2PCh. 2.7 - In each of Problems 1 through 4:
Find approximate...Ch. 2.7 - Prob. 4PCh. 2.7 - In each of Problems 5 through 10, draw a direction...Ch. 2.7 - Prob. 6PCh. 2.7 - Prob. 7PCh. 2.7 - Prob. 8PCh. 2.7 - Prob. 9PCh. 2.7 - Prob. 10PCh. 2.7 - Prob. 11PCh. 2.7 - Prob. 12PCh. 2.7 - Prob. 13PCh. 2.7 - Prob. 14PCh. 2.7 - Prob. 15PCh. 2.7 - Prob. 16PCh. 2.7 - Prob. 17PCh. 2.7 - Prob. 18PCh. 2.7 - Prob. 19PCh. 2.7 - Convergence of Euler’s Method. It can be shown...Ch. 2.7 - Prob. 21PCh. 2.7 - Prob. 22PCh. 2.7 - Prob. 23PCh. 2.8 - Prob. 1PCh. 2.8 - Prob. 2PCh. 2.8 - Prob. 3PCh. 2.8 - Prob. 4PCh. 2.8 - Prob. 5PCh. 2.8 - Prob. 6PCh. 2.8 - Prob. 7PCh. 2.8 - Prob. 8PCh. 2.8 - Prob. 9PCh. 2.8 - Prob. 10PCh. 2.8 - Prob. 11PCh. 2.8 - Prob. 12PCh. 2.8 - Prob. 13PCh. 2.8 - Prob. 14PCh. 2.8 - Prob. 15PCh. 2.8 - Prob. 16PCh. 2.8 - Prob. 17PCh. 2.8 - Prob. 18PCh. 2.8 - Prob. 19PCh. 2.9 - Prob. 1PCh. 2.9 - Prob. 2PCh. 2.9 - Prob. 3PCh. 2.9 - Prob. 4PCh. 2.9 - Prob. 5PCh. 2.9 - Prob. 6PCh. 2.9 - Find the effective annual yield of a bank account...Ch. 2.9 - An investor deposits $1000 in an account paying...Ch. 2.9 - A certain college graduate borrows $8000 to buy a...Ch. 2.9 - Prob. 10PCh. 2.9 - Prob. 11PCh. 2.9 - Prob. 12PCh. 2.9 - Prob. 13PCh. 2.9 - Prob. 14PCh. 2 - Prob. 1MPCh. 2 - Prob. 2MPCh. 2 - In each of Problems 1 through 32, solve the given...Ch. 2 - Prob. 4MPCh. 2 - Prob. 5MPCh. 2 - Prob. 6MPCh. 2 - Prob. 7MPCh. 2 - Prob. 8MPCh. 2 - Prob. 9MPCh. 2 - Prob. 10MPCh. 2 - Prob. 11MPCh. 2 - Prob. 12MPCh. 2 - Prob. 13MPCh. 2 - Prob. 14MPCh. 2 - Prob. 15MPCh. 2 - Prob. 16MPCh. 2 - Prob. 17MPCh. 2 - Prob. 18MPCh. 2 - Prob. 19MPCh. 2 - Prob. 20MPCh. 2 - Prob. 21MPCh. 2 - Prob. 22MPCh. 2 - Prob. 23MPCh. 2 - Prob. 24MPCh. 2 - Prob. 25MPCh. 2 - Prob. 26MPCh. 2 - Prob. 27MPCh. 2 - Prob. 28MPCh. 2 - Prob. 29MPCh. 2 - Prob. 30MPCh. 2 - Prob. 31MPCh. 2 - Prob. 32MPCh. 2 - Prob. 33MPCh. 2 - Prob. 34MPCh. 2 - Prob. 35MPCh. 2 - Prob. 36MPCh. 2 - Prob. 37MPCh. 2 - Prob. 38MPCh. 2 - Prob. 39MPCh. 2 - Prob. 40MPCh. 2 - Prob. 41MPCh. 2 - Prob. 42MPCh. 2 - Prob. 43MPCh. 2 - Prob. 44MPCh. 2 - Prob. 45MPCh. 2 - Prob. 46MPCh. 2 - Prob. 47MPCh. 2 - Prob. 48MPCh. 2 - Prob. 49MPCh. 2 - Prob. 50MPCh. 2 - Prob. 51MP
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