Differential Equations with Boundary-Value Problems (MindTap Course List)
9th Edition
ISBN: 9781305965799
Author: Dennis G. Zill
Publisher: Cengage Learning
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Chapter 7, Problem 45RE
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Question 1. (10 points)
A researcher is studying tumours in mice. The growth rate for the volume of the tumour V(t) in cm³ is given by
dV
=
1.45V(2 In(V+1)).
dt
(a) (4 pts) Find all the equilibria and determine their stability using the stability condition.
(b) (2 pts) Draw the phase plot f(V) versus V where f(V) = V'. You may find it helpful to use Desmos or Wolfram Alpha to plot the graph of
f(V) versus V (both are free to use online), or you can plot it by hand if you like. On the plot identify each equilibrium as stable or unstable.
(c) (4 pts) Draw direction arrows for the case where the tumour starts at size 3cm³ and for the case where the tumour starts at size 9cm³. Explain
in biological terms what happens to the size of each of these tumours at time progresses.
For the system consisting of the two planes:plane 1: -x + y + z = 0plane 2: 3x + y + 3z = 0a) Are the planes parallel and/or coincident? Justify your answer. What does this tell you about the solution to the system?b) Solve the system (if possible). Show a complete solution. If there is a line of intersection express it in parametric form.
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Chapter 7 Solutions
Differential Equations with Boundary-Value Problems (MindTap Course List)
Ch. 7.1 - In Problems 118 use Definition 7.1.1 to find f(t)....Ch. 7.1 - In Problems 118 use Definition 7.1.1 to find f(t)....Ch. 7.1 - In Problems 118 use Definition 7.1.1 to find f(t)....Ch. 7.1 - Prob. 4ECh. 7.1 - Prob. 5ECh. 7.1 - Prob. 6ECh. 7.1 - Prob. 7ECh. 7.1 - In Problems 118 use Definition 7.1.1 to find f(t)....Ch. 7.1 - In Problems 118 use Definition 7.1.1 to find f(t)....Ch. 7.1 - Prob. 10E
Ch. 7.1 - Prob. 11ECh. 7.1 - Prob. 12ECh. 7.1 - In Problems 118 use Definition 7.1.1 to find f(t)....Ch. 7.1 - Prob. 14ECh. 7.1 - Prob. 15ECh. 7.1 - Prob. 16ECh. 7.1 - In Problems 118 use Definition 7.1.1 to find f(t)....Ch. 7.1 - In Problems 118 use Definition 7.1.1 to find f(t)....Ch. 7.1 - In Problems 1936 use Theorem 7.1.1 to find f(t)....Ch. 7.1 - Prob. 20ECh. 7.1 - Prob. 21ECh. 7.1 - In Problems 1936 use Theorem 7.1.1 to find f(t)....Ch. 7.1 - In Problems 1936 use Theorem 7.1.1 to find f(t)....Ch. 7.1 - Prob. 24ECh. 7.1 - In Problems 1936 use Theorem 7.1.1 to find f(t)....Ch. 7.1 - In Problems 1936 use Theorem 7.1.1 to find f(t)....Ch. 7.1 - Prob. 27ECh. 7.1 - Prob. 28ECh. 7.1 - In Problems 1936 use Theorem 7.1.1 to find f(t)....Ch. 7.1 - In Problems 1936 use Theorem 7.1.1 to find f(t)....Ch. 7.1 - In Problems 1936 use Theorem 7.1.1 to find f(t)....Ch. 7.1 - In Problems 1936 use Theorem 7.1.1 to find f(t)....Ch. 7.1 - In Problems 1936 use Theorem 7.1.1 to find f(t)....Ch. 7.1 - In Problems 1936 use Theorem 7.1.1 to find f(t)....Ch. 7.1 - In Problems 1936 use Theorem 7.1.1 to find f(t)....Ch. 7.1 - In Problems 1936 use Theorem 7.1.1 to find f(t)....Ch. 7.1 - In Problems 3740 find f(t) by first using a...Ch. 7.1 - In Problems 3740 find f(t) by first using a...Ch. 7.1 - In Problems 3740 find f(t) by first using a...Ch. 7.1 - In Problems 3740 find f(t) by first using a...Ch. 7.1 - Prob. 41ECh. 7.1 - Prob. 42ECh. 7.1 - Prob. 43ECh. 7.1 - Prob. 44ECh. 7.1 - In Problems 4346 use Problems 41 and 42 and the...Ch. 7.1 - Prob. 46ECh. 7.1 - Suppose that if {f1(t)} = F1(s) for s c1 and that...Ch. 7.1 - Figure 7.1.4 suggests, but does not prove, that...Ch. 7.1 - Discussion Problems Use part (c) of Theorem 7.1.1...Ch. 7.1 - Prob. 50ECh. 7.1 - Prob. 51ECh. 7.1 - Show that the function f(t)=1/t2 does not possess...Ch. 7.1 - Prob. 53ECh. 7.1 - Prob. 54ECh. 7.1 - Prob. 55ECh. 7.1 - Prob. 56ECh. 7.1 - Prob. 57ECh. 7.1 - In Problems 5558 use the given Laplace transform...Ch. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - Prob. 2ECh. 7.2 - Prob. 3ECh. 7.2 - Prob. 4ECh. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - Prob. 7ECh. 7.2 - Prob. 8ECh. 7.2 - Prob. 9ECh. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - Prob. 12ECh. 7.2 - Prob. 13ECh. 7.2 - Prob. 14ECh. 7.2 - Prob. 15ECh. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - Prob. 22ECh. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - Prob. 24ECh. 7.2 - Prob. 25ECh. 7.2 - Prob. 26ECh. 7.2 - Prob. 27ECh. 7.2 - Prob. 28ECh. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - In Problems 130 use appropriate algebra and...Ch. 7.2 - In Problems 3134 find the given inverse Laplace...Ch. 7.2 - In Problems 3134 find the given inverse Laplace...Ch. 7.2 - In Problems 3134 find the given inverse Laplace...Ch. 7.2 - In Problems 3134 find the given inverse Laplace...Ch. 7.2 - In Problems 3544 use the Laplace transform to...Ch. 7.2 - In Problems 3544 use the Laplace transform to...Ch. 7.2 - In Problems 3544 use the Laplace transform to...Ch. 7.2 - In Problems 3544 use the Laplace transform to...Ch. 7.2 - In Problems 3544 use the Laplace transform to...Ch. 7.2 - In Problems 3544 use the Laplace transform to...Ch. 7.2 - In Problems 3544 use the Laplace transform to...Ch. 7.2 - Prob. 42ECh. 7.2 - In Problems 3544 use the Laplace transform to...Ch. 7.2 - In Problems 3544 use the Laplace transform to...Ch. 7.2 - The inverse forms of the results in Problem 49 in...Ch. 7.2 - Prob. 46ECh. 7.2 - Prob. 47ECh. 7.2 - Prob. 48ECh. 7.2 - Prob. 49ECh. 7.2 - Make up two functions f1 and f2 that have the same...Ch. 7.2 - Prob. 51ECh. 7.2 - Prob. 52ECh. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - Find either F(s) or f (t), as indicated. {e2t(t ...Ch. 7.3 - Find either F(s) or f (t), as indicated. {et sin...Ch. 7.3 - Find either F(s) or f (t), as indicated. {e2t cos...Ch. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - Prob. 12ECh. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - Prob. 15ECh. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - In Problems 120 find either F(s) or f(t), as...Ch. 7.3 - In Problems 2130 use the Laplace transform to...Ch. 7.3 - Prob. 22ECh. 7.3 - Prob. 23ECh. 7.3 - Prob. 24ECh. 7.3 - Prob. 25ECh. 7.3 - Prob. 26ECh. 7.3 - In Problems 2130 use the Laplace transform to...Ch. 7.3 - Prob. 28ECh. 7.3 - In Problems 2130 use the Laplace transform to...Ch. 7.3 - Prob. 30ECh. 7.3 - In Problems 31 and 32 use the Laplace transform...Ch. 7.3 - In Problems 31 and 32 use the Laplace transform...Ch. 7.3 - Prob. 33ECh. 7.3 - Recall that the differential equation for the...Ch. 7.3 - Prob. 35ECh. 7.3 - Prob. 36ECh. 7.3 - In Problems 3748 find either F(s) or f(t), as...Ch. 7.3 - In Problems 3748 find either F(s) or f(t), as...Ch. 7.3 - In Problems 3748 find either F(s) or f(t), as...Ch. 7.3 - In Problems 3748 find either F(s) or f(t), as...Ch. 7.3 - In Problems 3748 find either F(s) or f(t), as...Ch. 7.3 - In Problems 3748 find either F(s) or f(t), as...Ch. 7.3 - In Problems 3748 find either F(s) or f(t), as...Ch. 7.3 - Prob. 44ECh. 7.3 - Prob. 45ECh. 7.3 - Prob. 46ECh. 7.3 - Prob. 47ECh. 7.3 - Prob. 48ECh. 7.3 - Prob. 49ECh. 7.3 - Prob. 50ECh. 7.3 - Prob. 51ECh. 7.3 - Prob. 52ECh. 7.3 - Prob. 53ECh. 7.3 - Prob. 54ECh. 7.3 - In Problems 5562 write each function in terms of...Ch. 7.3 - Prob. 56ECh. 7.3 - In Problems 5562 write each function in terms of...Ch. 7.3 - Prob. 58ECh. 7.3 - Prob. 59ECh. 7.3 - Prob. 60ECh. 7.3 - Prob. 61ECh. 7.3 - Prob. 62ECh. 7.3 - In Problems 6370 use the Laplace transform to...Ch. 7.3 - Prob. 64ECh. 7.3 - Prob. 65ECh. 7.3 - Prob. 66ECh. 7.3 - Prob. 67ECh. 7.3 - Prob. 68ECh. 7.3 - Prob. 69ECh. 7.3 - Prob. 70ECh. 7.3 - Suppose a 32-pound weight stretches a spring 2...Ch. 7.3 - Prob. 72ECh. 7.3 - Prob. 73ECh. 7.3 - Prob. 74ECh. 7.3 - Prob. 75ECh. 7.3 - Prob. 76ECh. 7.3 - Prob. 77ECh. 7.3 - Prob. 78ECh. 7.3 - Prob. 79ECh. 7.3 - Prob. 80ECh. 7.3 - Discuss how you would fix up each of the following...Ch. 7.3 - Prob. 83ECh. 7.4 - In Problems 18 use Theorem 7.4.1 to evaluate the...Ch. 7.4 - In Problems 18 use Theorem 7.4.1 to evaluate the...Ch. 7.4 - In Problems 18 use Theorem 7.4.1 to evaluate the...Ch. 7.4 - In Problems 18 use Theorem 7.4.1 to evaluate the...Ch. 7.4 - In Problems 18 use Theorem 7.4.1 to evaluate the...Ch. 7.4 - Prob. 6ECh. 7.4 - In Problems 18 use Theorem 7.4.1 to evaluate the...Ch. 7.4 - Prob. 8ECh. 7.4 - In Problems 914 use the Laplace transform to solve...Ch. 7.4 - Prob. 10ECh. 7.4 - In Problems 914 use the Laplace transform to solve...Ch. 7.4 - In Problems 914 use the Laplace transform to solve...Ch. 7.4 - Prob. 13ECh. 7.4 - In Problems 914 use the Laplace transform to solve...Ch. 7.4 - Prob. 15ECh. 7.4 - Prob. 16ECh. 7.4 - In some instances the Laplace transform can be...Ch. 7.4 - In some instances the Laplace transform can be...Ch. 7.4 - Prob. 19ECh. 7.4 - Prob. 20ECh. 7.4 - In Problems 1922 proceed as in Example 3 and find...Ch. 7.4 - Prob. 22ECh. 7.4 - In Problems 2334 proceed as in Example 4 and find...Ch. 7.4 - In Problems 2334 proceed as in Example 4 and find...Ch. 7.4 - In Problems 2334 proceed as in Example 4 and find...Ch. 7.4 - In Problems 2334 proceed as in Example 4 and find...Ch. 7.4 - In Problems 2334 proceed as in Example 4 and find...Ch. 7.4 - Prob. 28ECh. 7.4 - Prob. 29ECh. 7.4 - In Problems 2334 proceed as in Example 4 and find...Ch. 7.4 - In Problems 2334 proceed as in Example 4 and find...Ch. 7.4 - In Problems 2334 proceed as in Example 4 and find...Ch. 7.4 - Prob. 33ECh. 7.4 - In Problems 2334 proceed as in Example 4 and find...Ch. 7.4 - Prob. 35ECh. 7.4 - Prob. 36ECh. 7.4 - Prob. 37ECh. 7.4 - Prob. 38ECh. 7.4 - Prob. 40ECh. 7.4 - Prob. 41ECh. 7.4 - Prob. 42ECh. 7.4 - Prob. 43ECh. 7.4 - In Problems 4150 use the Laplace transform to...Ch. 7.4 - In Problems 4150 use the Laplace transform to...Ch. 7.4 - Prob. 46ECh. 7.4 - In Problems 4150 use the Laplace transform to...Ch. 7.4 - In Problems 4150 use the Laplace transform to...Ch. 7.4 - In Problems 4150 use the Laplace transform to...Ch. 7.4 - Prob. 50ECh. 7.4 - In Problems 51 and 52 solve equation (10) subject...Ch. 7.4 - Prob. 52ECh. 7.4 - In Problems 5358 use Theorem 7.4.3 to find the...Ch. 7.4 - In Problems 5358 use Theorem 7.4.3 to find the...Ch. 7.4 - In Problems 5358 use Theorem 7.4.3 to find the...Ch. 7.4 - In Problems 5358 use Theorem 7.4.3 to find the...Ch. 7.4 - In Problems 5358 use Theorem 7.4.3 to find the...Ch. 7.4 - In Problems 5358 use Theorem 7.4.3 to find the...Ch. 7.4 - Prob. 59ECh. 7.4 - Prob. 60ECh. 7.4 - Prob. 61ECh. 7.4 - Prob. 62ECh. 7.4 - Prob. 63ECh. 7.4 - Prob. 64ECh. 7.4 - (a)Laguerres differential equation ty+(1t)y+ny=0...Ch. 7.4 - Prob. 66ECh. 7.4 - Prob. 67ECh. 7.4 - Prob. 68ECh. 7.4 - Prob. 69ECh. 7.4 - Prob. 70ECh. 7.4 - Prob. 71ECh. 7.4 - Appropriately modify the procedure of Problem 72...Ch. 7.4 - Prob. 74ECh. 7.5 - In Problems 112 use the Laplace transform to solve...Ch. 7.5 - Prob. 2ECh. 7.5 - Prob. 3ECh. 7.5 - Prob. 4ECh. 7.5 - Prob. 5ECh. 7.5 - Prob. 6ECh. 7.5 - In Problems 112 use the Laplace transform to solve...Ch. 7.5 - Prob. 8ECh. 7.5 - Prob. 9ECh. 7.5 - Prob. 10ECh. 7.5 - In Problems 112 use the Laplace transform to solve...Ch. 7.5 - Prob. 12ECh. 7.5 - In Problems 13 and 14 use the Laplace transform to...Ch. 7.5 - Prob. 14ECh. 7.5 - Prob. 15ECh. 7.5 - Prob. 16ECh. 7.5 - Prob. 17ECh. 7.5 - Prob. 18ECh. 7.6 - Prob. 1ECh. 7.6 - Prob. 2ECh. 7.6 - Prob. 3ECh. 7.6 - Prob. 4ECh. 7.6 - Prob. 5ECh. 7.6 - Prob. 6ECh. 7.6 - d2xdt2+xy=0d2ydt2+yx=0 x(0) = 0, x(0) = 2, y(0) =...Ch. 7.6 - Prob. 8ECh. 7.6 - Prob. 9ECh. 7.6 - dxdt4x+d3ydt3=6sintdxdt+2x2d3ydt3=0 x(0) = 0, y(0)...Ch. 7.6 - Prob. 11ECh. 7.6 - Prob. 12ECh. 7.6 - Prob. 13ECh. 7.6 - Prob. 14ECh. 7.6 - (a) Show that the system of differential equations...Ch. 7.6 - (a) In Problem 12 in Exercises 3.3 you were asked...Ch. 7.6 - Prob. 17ECh. 7.6 - Prob. 18ECh. 7.6 - Prob. 19ECh. 7.6 - Prob. 20ECh. 7 - In Problems 1 and 2 use the definition of the...Ch. 7 - Prob. 2RECh. 7 - Prob. 3RECh. 7 - Prob. 4RECh. 7 - Prob. 5RECh. 7 - Prob. 6RECh. 7 - Prob. 7RECh. 7 - Prob. 8RECh. 7 - Prob. 9RECh. 7 - Prob. 10RECh. 7 - Prob. 11RECh. 7 - Prob. 12RECh. 7 - Prob. 13RECh. 7 - Prob. 14RECh. 7 - Prob. 15RECh. 7 - Prob. 16RECh. 7 - Prob. 17RECh. 7 - Prob. 18RECh. 7 - Prob. 19RECh. 7 - Prob. 20RECh. 7 - Prob. 21RECh. 7 - Prob. 22RECh. 7 - Prob. 23RECh. 7 - Prob. 24RECh. 7 - Prob. 25RECh. 7 - Prob. 26RECh. 7 - Prob. 27RECh. 7 - Prob. 28RECh. 7 - Prob. 29RECh. 7 - Prob. 30RECh. 7 - Prob. 31RECh. 7 - In Problems 2932 express f in terms of unit step...Ch. 7 - Prob. 33RECh. 7 - Prob. 34RECh. 7 - Prob. 35RECh. 7 - Prob. 36RECh. 7 - Prob. 37RECh. 7 - Prob. 38RECh. 7 - Prob. 39RECh. 7 - Prob. 40RECh. 7 - Prob. 41RECh. 7 - Prob. 42RECh. 7 - Prob. 43RECh. 7 - Prob. 44RECh. 7 - Prob. 45RECh. 7 - Prob. 46RECh. 7 - A uniform cantilever beam of length L is embedded...Ch. 7 - When a uniform beam is supported by an elastic...Ch. 7 - Prob. 49RECh. 7 - Coulomb Friction Revlslted In Problem 27 in...Ch. 7 - Range of a ProjectileNo Air Resistance (a) A...
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