Thomas' Calculus (14th Edition)
14th Edition
ISBN: 9780134438986
Author: Joel R. Hass, Christopher E. Heil, Maurice D. Weir
Publisher: PEARSON
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Chapter 9, Problem 9GYR
To determine
The reason for exponential model being unrealistic for predicting long term population growth, the logistic model being correct for deficiency in the exponential model for population growth. Also to define logistic
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Question 4. Suppose you need to know an equation of the tangent plane to a
surface S at the point P(2, 1, 3). You don't have an equation for S but you know
that the curves
r1(t) = (2 + 3t, 1 — t², 3 − 4t + t²)
r2(u) = (1 + u², 2u³ − 1, 2u + 1)
both lie on S.
(a) Check that both r₁ and r2 pass through the point P.
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⚫ in terms of t using the expression of z(t) in the curve r1
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in terms of u using the expression of z(u) in the curve r2
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Coast Guard Patrol Search Mission The pilot of a Coast Guard patrol aircraft on a search mission had just spotted a disabled fishing trawler and
decided to go in for a closer look. Flying in a straight line at a constant altitude of 1000 ft and at a steady speed of 256 ft/s, the aircraft passed directly over
the trawler. How fast (in ft/s) was the aircraft receding from the trawler when it was 1400 ft from the trawler? (Round your answer to one decimal places.)
1000 ft
180
× ft/s
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6. The largest interval in which the solution of (cos t)y′′ +t^2y′ − (5/t)y = e^t/(t−3) , y(1) = 2, y′(1) = 0is guaranteed to exist by the Existence and Uniqueness Theorem is:A. (0, ∞) B. (π/2, 3) C. (0,π/2) D. (0, π) E. (0, 3)
Chapter 9 Solutions
Thomas' Calculus (14th Edition)
Ch. 9.1 - In Exercises 1–4, match the differential equations...Ch. 9.1 - In Exercises 1–4, match the differential equations...Ch. 9.1 - In Exercises 1–4, match the differential equations...Ch. 9.1 - In Exercises 1–4, match the differential equations...Ch. 9.1 - Prob. 5ECh. 9.1 - Prob. 6ECh. 9.1 - Prob. 7ECh. 9.1 - Prob. 8ECh. 9.1 - In Exercises 7–12, write an equivalent first-order...Ch. 9.1 - Prob. 10E
Ch. 9.1 - Prob. 11ECh. 9.1 - In Exercises 7–12, write an equivalent first-order...Ch. 9.1 - Prob. 13ECh. 9.1 - In Exercises 13 and 14, consider the differential...Ch. 9.1 - In Exercises 15–20, use Euler’s method to...Ch. 9.1 - Prob. 16ECh. 9.1 - Prob. 17ECh. 9.1 - Prob. 18ECh. 9.1 - Prob. 19ECh. 9.1 - In Exercises 15–20, use Euler’s method to...Ch. 9.1 - Use the Euler method with dx = 0.2 to estimate...Ch. 9.1 - Prob. 22ECh. 9.1 - Prob. 23ECh. 9.1 - Prob. 24ECh. 9.1 - Prob. 25ECh. 9.1 - Prob. 26ECh. 9.2 - Solve the differential equations in Exercises...Ch. 9.2 - Solve the differential equations in Exercises...Ch. 9.2 - Prob. 3ECh. 9.2 - Prob. 4ECh. 9.2 - Prob. 5ECh. 9.2 - Solve the differential equations in Exercises...Ch. 9.2 - Prob. 7ECh. 9.2 - Prob. 8ECh. 9.2 - Solve the differential equations in Exercises...Ch. 9.2 - Prob. 10ECh. 9.2 - Solve the differential equations in Exercises...Ch. 9.2 - Solve the differential equations in Exercises...Ch. 9.2 - Prob. 13ECh. 9.2 - Prob. 14ECh. 9.2 - Prob. 15ECh. 9.2 - Solve the initial value problems in Exercises...Ch. 9.2 - Prob. 17ECh. 9.2 - Prob. 18ECh. 9.2 - Prob. 19ECh. 9.2 - Prob. 20ECh. 9.2 - Solve the exponential growth/decay initial value...Ch. 9.2 - Prob. 22ECh. 9.2 - Prob. 23ECh. 9.2 - Prob. 24ECh. 9.2 - Prob. 25ECh. 9.2 - Current in an open RL circuit If the switch is...Ch. 9.2 - Prob. 27ECh. 9.2 - Derivation of Equation (7) in Example 4
Show that...Ch. 9.2 - Prob. 29ECh. 9.2 - Prob. 30ECh. 9.2 - Prob. 31ECh. 9.2 - Solve the Bernoulli equations in Exercises...Ch. 9.3 - Coasting bicycle A 66-kg cyclist on a 7-kg bicycle...Ch. 9.3 - Prob. 2ECh. 9.3 - Prob. 3ECh. 9.3 - Prob. 4ECh. 9.3 - Prob. 5ECh. 9.3 - Prob. 6ECh. 9.3 - Prob. 7ECh. 9.3 - Prob. 8ECh. 9.3 - Prob. 9ECh. 9.3 - Prob. 10ECh. 9.3 - Show that the curves 2x2 + 3y2 = 5 and y2 = x3 are...Ch. 9.3 - Prob. 12ECh. 9.3 - Salt mixture A tank initially contains 100 gal of...Ch. 9.3 - Prob. 14ECh. 9.3 - Fertilizer mixture A tank contains 100 gal of...Ch. 9.3 - Prob. 16ECh. 9.4 - Prob. 1ECh. 9.4 - Prob. 2ECh. 9.4 - Prob. 3ECh. 9.4 - Prob. 4ECh. 9.4 - Prob. 5ECh. 9.4 - Prob. 6ECh. 9.4 - Prob. 7ECh. 9.4 - Prob. 8ECh. 9.4 - Prob. 9ECh. 9.4 - Prob. 10ECh. 9.4 - Prob. 11ECh. 9.4 - Prob. 12ECh. 9.4 - Prob. 13ECh. 9.4 - Controlling a population The fish and game...Ch. 9.4 - Prob. 15ECh. 9.4 - Prob. 16ECh. 9.4 - Prob. 17ECh. 9.4 - Prob. 18ECh. 9.4 - Prob. 19ECh. 9.4 - Prob. 20ECh. 9.5 - Prob. 1ECh. 9.5 - Prob. 2ECh. 9.5 - Develop a model for the growth of trout and bass,...Ch. 9.5 - Prob. 4ECh. 9.5 - Consider another competitive-hunter model defined...Ch. 9.5 - An economic model Consider the following economic...Ch. 9.5 - Two trajectories approach equilibrium Show that...Ch. 9.5 - Prob. 8ECh. 9.5 - Prob. 9ECh. 9.5 - Prob. 10ECh. 9.5 - Prob. 11ECh. 9.5 - In 1925 Lotka and Volterra introduced the...Ch. 9.5 - Prob. 13ECh. 9.5 - At some time during a trajectory cycle, a wolf...Ch. 9 - Prob. 1GYRCh. 9 - What is a general solution? What is a particular...Ch. 9 - Prob. 3GYRCh. 9 - Prob. 4GYRCh. 9 - Prob. 5GYRCh. 9 - What is an orthogonal trajectory of a family of...Ch. 9 - Prob. 7GYRCh. 9 - Prob. 8GYRCh. 9 - Prob. 9GYRCh. 9 - Prob. 10GYRCh. 9 - Prob. 1PECh. 9 - Prob. 2PECh. 9 - In Exercises 1-22, solve the differential...Ch. 9 - Prob. 4PECh. 9 - Prob. 5PECh. 9 - In Exercises 1-22, solve the differential...Ch. 9 - Prob. 7PECh. 9 - Prob. 8PECh. 9 - Prob. 9PECh. 9 - Prob. 10PECh. 9 - Prob. 11PECh. 9 - Prob. 12PECh. 9 - Prob. 13PECh. 9 - Prob. 14PECh. 9 - Prob. 15PECh. 9 - Prob. 16PECh. 9 - Prob. 17PECh. 9 - Prob. 18PECh. 9 - Prob. 19PECh. 9 - Prob. 20PECh. 9 - Prob. 21PECh. 9 - Prob. 22PECh. 9 - Prob. 23PECh. 9 - Prob. 24PECh. 9 - Prob. 25PECh. 9 - Prob. 26PECh. 9 - Prob. 27PECh. 9 - Prob. 28PECh. 9 - Prob. 29PECh. 9 - Prob. 30PECh. 9 - Prob. 31PECh. 9 - Prob. 32PECh. 9 - Prob. 35PECh. 9 - Prob. 36PECh. 9 - In Exercises 35–38, sketch part of the equation’s...Ch. 9 - Prob. 38PECh. 9 - Prob. 39PECh. 9 - Prob. 40PECh. 9 - Prob. 41PECh. 9 - Prob. 42PECh. 9 - Prob. 43PECh. 9 - Prob. 44PECh. 9 - Prob. 1AAECh. 9 - Prob. 2AAECh. 9 - Prob. 3AAECh. 9 - Prob. 4AAECh. 9 - Prob. 5AAECh. 9 - Prob. 6AAECh. 9 - Prob. 7AAECh. 9 - Prob. 8AAECh. 9 - Prob. 9AAECh. 9 - Prob. 10AAE
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- 12. For the differential equation in the previous question, what is the correct form for a particularsolution?A. yp = Ae^t + Bt^2 B. yp = Ae^t + Bt^2 + Ct + DC. yp = Ate^t + Bt^2 D. yp = Ate^t + Bt^2 + Ct + D Previous differential equation y′′ − 4y′ + 3y = e^t + t^2arrow_forward16. The appropriate form for the particular solution yp(x) of y^(3) − y′′ − 2y′ = x^2 + e^2x isA. yp(x) = Ax^2 + Bx + C + De^2x B. yp(x) = Ax^3 + Bx^2 + Cx + Dxe^2xC. yp(x) = Ax^2 +Be^2x D. yp(x) = A+Be^2x +Ce^−x E. yp(x) = Ax^2 +Bx+C +(Dx+E)e^2xarrow_forwardDistance Between Two Ships Two ships leave the same port at noon. Ship A sails north at 17 mph, and ship B sails east at 11 mph. How fast is the distance between them changing at 1 p.m.? (Round your answer to one decimal place.) 20.3 X mph Need Help? Read It Watch It SUBMIT ANSWERarrow_forward
- practice problem please help!arrow_forwardFind the first and second derivatives of the function. f(u) = √7 3u − 3 f'(u) 2 (7-34) (½) f"(u) = 9 4(7-3u) 32 X Need Help? Read It Watch It SUBMIT ANSWERarrow_forward11. Consider the 2nd-order non-homogeneous differential equation y′′ − 4y′ + 3y = et + t2What is the complementary (or homogeneous) solution?A. yc = c1e^t + c2t^2 B. yc = c1e^−t + c2e^−3t C. yc = c1e^t + c2e^3t D. yc = c1e^t + c2e^−3tarrow_forward
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