Fundamentals of Differential Equations (9th Edition)
9th Edition
ISBN: 9780321977069
Author: R. Kent Nagle, Edward B. Saff, Arthur David Snider
Publisher: PEARSON
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2.
Let P(t) represent the population of Los Angeles t years after 1900.
(a)
Interpret P(10) = 319, 198 in words.
P(10) - Р(0)
(b)
Given that P(0) = 102, 479 and P(10) = 319, 198, calculate and interpret
10 – 0
in words.
(c)
of Los Angeles reached 200,000.
Set up an equation that could be used to find how many years after 1900 the population
In Problems 23–30, use the given zero to find the remaining zeros of each function.
In Problems 23–28, answer the questions about the given function.
x² + 2
26. f(x) =
x + 4
23. f(x) = 2x? - x - 1
(a) Is the point (-1, 2) on the graph of f?
(b) If x = -2, what is f(x)? What point is on the graph of f?
(c) If f(x) = -1, what is x? What point(s) are on the graph
of f?
(d) What is the domain of f?
(e) List the x-intercepts, if any, of the graph of f.
(f) List the y-intercept, if there is one, of the graph of f.
24. f(x) = -3x² + 5x
(a) Is the point (-1, 2) on the graph of f?
(b) If x = -2, what is f(x)? What point is on the graph
of f?
(c) If f(x) = -2, what is x? What point(s) are on the graph
of f?
(d) What is the domain of f?
(e) List the x-intercepts, if any, of the graph of f.
(f) List the y-intercept, if there is one, of the graph of f.
x + 2
(a) Is the point ( 1,) on the graph of f?
(b) If x = 0, what is f(x)? What point is on the graph of f?
(c) If f(x) =5. what is x? What point(s) are on the graph
of f?
(d) What is the domain of f?
(e) List the x-intercepts, if…
Chapter 1 Solutions
Fundamentals of Differential Equations (9th Edition)
Ch. 1.1 - In Problems 112, a differential equation is given...Ch. 1.1 - In Problems 112, a differential equation is given...Ch. 1.1 - In Problems 112, a differential equation is given...Ch. 1.1 - In Problems 112, a differential equation is given...Ch. 1.1 - In Problems 112, a differential equation is given...Ch. 1.1 - In Problems 112, a differential equation is given...Ch. 1.1 - In Problems 112, a differential equation is given...Ch. 1.1 - In Problems 112, a differential equation is given...Ch. 1.1 - Prob. 9ECh. 1.1 - In Problems 112, a differential equation is given...
Ch. 1.1 - In Problems 112, a differential equation is given...Ch. 1.1 - Prob. 12ECh. 1.1 - In Problems 1316, write a differential equation...Ch. 1.1 - In Problems 1316, write a differential equation...Ch. 1.1 - In Problems 1316, write a differential equation...Ch. 1.1 - In Problems 1316, write a differential equation...Ch. 1.1 - Prob. 17ECh. 1.2 - (a) Show that (x) = x2 is an explicit solution to...Ch. 1.2 - (a) Show that y2 + x 3 = 0 is an implicit...Ch. 1.2 - In Problems 38, determine whether the given...Ch. 1.2 - In Problems 38, determine whether the given...Ch. 1.2 - In Problems 38, determine whether the given...Ch. 1.2 - In Problems 38, determine whether the given...Ch. 1.2 - In Problems 38, determine whether the given...Ch. 1.2 - In Problems 38, determine whether the given...Ch. 1.2 - In Problems 913, determine whether the given...Ch. 1.2 - In Problems 913, determine whether the given...Ch. 1.2 - In Problems 913, determine whether the given...Ch. 1.2 - In Problems 913, determine whether the given...Ch. 1.2 - In Problems 913, determine whether the given...Ch. 1.2 - Prob. 14ECh. 1.2 - Verify that (x) = 2/(1 cex), where c is an...Ch. 1.2 - Verify that x2 + cy2 = 1, where c is an arbitrary...Ch. 1.2 - Show that (x) = Ce3x + 1 is a solution to dy/dx ...Ch. 1.2 - Let c 0. Show that the function (x) = (c2 x2) 1...Ch. 1.2 - Prob. 19ECh. 1.2 - Determine for which values of m the function (x) =...Ch. 1.2 - Prob. 21ECh. 1.2 - Prob. 22ECh. 1.2 - Prob. 23ECh. 1.2 - In Problem 2328, determine whether Theorem 1...Ch. 1.2 - In Problem 2328, determine whether Theorem 1...Ch. 1.2 - (a) Find the total area between f(x) = x3 x and...Ch. 1.2 - In Problem 2328, determine whether Theorem 1...Ch. 1.2 - In Problem 2328, determine whether Theorem 1...Ch. 1.2 - (a) For the initial value problem (12) of Example...Ch. 1.2 - Prob. 30ECh. 1.2 - Consider the equation of Example 5, (13)ydydx4x=0....Ch. 1.3 - The direction field for dy/dx = 4x/y is shown in...Ch. 1.3 - Prob. 2ECh. 1.3 - A model for the velocity at time t of a certain...Ch. 1.3 - Prob. 4ECh. 1.3 - The logistic equation for the population (in...Ch. 1.3 - Consider the differential equation dydx=x+siny....Ch. 1.3 - Consider the differential equation dpdt=p(p1)(2p)...Ch. 1.3 - The motion of a set of particles moving along the...Ch. 1.3 - Let (x) denote the solution to the initial value...Ch. 1.3 - Use a computer software package to sketch the...Ch. 1.3 - Prob. 11ECh. 1.3 - Prob. 12ECh. 1.3 - Prob. 13ECh. 1.3 - In Problems 11-16, draw the isoclines with their...Ch. 1.3 - Prob. 15ECh. 1.3 - Prob. 16ECh. 1.3 - From a sketch of the direction field, what can one...Ch. 1.3 - Prob. 18ECh. 1.3 - Prob. 19ECh. 1.3 - Prob. 20ECh. 1.4 - In many of the problems below, it will be helpful...Ch. 1.4 - Prob. 2ECh. 1.4 - Prob. 3ECh. 1.4 - Prob. 4ECh. 1.4 - Prob. 5ECh. 1.4 - Use Eulers method with step size h = 0.2 to...Ch. 1.4 - Prob. 7ECh. 1.4 - Prob. 8ECh. 1.4 - Prob. 9ECh. 1.4 - Use the strategy of Example 3 to find a value of h...Ch. 1.4 - Prob. 11ECh. 1.4 - Prob. 12ECh. 1.4 - Prob. 13ECh. 1.4 - Prob. 14ECh. 1.4 - Prob. 15ECh. 1.4 - Prob. 16ECh. 1 - In Problems 16, identify the independent variable,...Ch. 1 - Prob. 2RPCh. 1 - Prob. 3RPCh. 1 - Prob. 4RPCh. 1 - Prob. 5RPCh. 1 - Prob. 6RPCh. 1 - Prob. 7RPCh. 1 - Prob. 8RPCh. 1 - Prob. 9RPCh. 1 - Prob. 10RPCh. 1 - Prob. 11RPCh. 1 - Prob. 12RPCh. 1 - Prob. 13RPCh. 1 - Prob. 14RPCh. 1 - Prob. 15RPCh. 1 - Prob. 16RPCh. 1 - Prob. 17RPCh. 1 - Prob. 1TWECh. 1 - Compare the different types of solutions discussed...
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- In Problems 39–46, show that 1f ∘ g2 1x2 = 1g ∘ f2 1x2 = x.arrow_forwardIn Problems 93–104, graph each polynomial function. 93. f(x) = x + 2r? - 5x - 6 94. f(x) = x' + &r? + 11x – 20 95. f(x) = 2x –x² + 2r – 1 96. f(x) = 2r + x² + 2x + 1 97. f(x) = x* + x² - 2 98. f(x) = x - 3x² – 4 %3D %3D 99. f(x) = 4x* + 7x? – 2 100. f(x) = 4xr + 15x? - 4 101. f(x) = x* + x³ - 3x² - x + 2 %3D %3D %3D 102. f(x) = x* - x - 6r? + 4x + 8 103. f(x) 4x5 - 8x - x + 2 104. f(x) = 4xs + 12x - x - 3arrow_forward4. Solve (x-3)(x² – 3x + 4) = 0arrow_forward
- 2. x + 4x + 6 = 0 Workarrow_forwarddr 1. J(x-3)(x-2)arrow_forwardb. Are there any critical values for either graph? Where are the intersections between the two? What do these intersections represent? c. Find the points where the hours of daylight are at a maximum/minimum. Around what time of the year are these points? Compare the information. d. What tools did you use to solve this problem? What other ways could you have come to find the same solution? e. How many hours of daylight are in each location at t=5? at t=8?arrow_forward
- 3. Which point below would be in the solution set of the function y = x + 10 (10, 0) (0, 10) C. (1, 10) D (10,1)arrow_forward6. Which of the following shows the graph of f(x) = 2(x-1)² – 3 %3D by by -3 2 b. d. a 7. The vertex of the quadratic equation f(x) = (x +1}² – 2 is b. (-1, 2} d. (-1, -2) a. (1, -2) c. (1, -2) 8. Consider the quadratic function f(x) = (x+ 3 )² + 2, the axis of symmetry of the function is a x = -3 b. x = 3 C. X = 2 d. x = -2 9. The graph of f(x) = (x+1 )2 – 2 is obtained by sliding the graph of y = x² a. 1 unit to the right and 2 units downward b. I unít to the left and 2 units downward ud. 1 unit to the left and 2 units upward c. 1 unit to the right and 2 units upward 10. Which of the following is a quadratic function? a. y=3+x? b. 2y2+ 3 = x c. y=3x+52 d. y=8+6* 11. What is the equation of the axis of symmetry of a quadratic function y = x2-4x-10? с. X3 1 d. x = -1 а. х32 b. x= -2arrow_forwardIn Problems 33–44, determine algebraically whether each function is even, odd, or neither. 34. f(x) = 2x* –x? 38. G(x) = Vĩ 33. f(x) = 4x 37. F(x) = V 35. g(x) = -3x² – 5 39. f(x) = x + |x| 36. h (х) — Зx3 + 5 40. f(x) = V2r²+ 1 x² + 3 -x 42. h(x) =- 1 2x 44. F(x) 41. g(x) 43. h(x) x2 - 1 3x2 - 9arrow_forward
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