Discrete Mathematics
5th Edition
ISBN: 9780134689562
Author: Dossey, John A.
Publisher: Pearson,
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Chapter A.3, Problem 23E
To determine
To prove or disprove: The result “For every positive integer n,
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Let f be defined as follows.
y = f(x) = x² - 5x
(a) Find the average rate of change of y with respect to x in the following intervals.
from x = 4 to x = 5
from x = 4 to x = 4.5
from x = 4 to x = 4.1
(b) Find the (instantaneous) rate of change of y at x = 4.
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Determine whether the inverse of f(x)=x^4+2 is a function. Then, find the inverse.
Velocity of a Ball Thrown into the Air The position function of an object moving along a straight line is given by s = f(t). The average velocity of
the object over the time interval [a, b] is the average rate of change of f over [a, b]; its (instantaneous) velocity at t = a is the rate of change of f at a.
A ball is thrown straight up with an initial velocity of 128 ft/sec, so that its height (in feet) after t sec is given by s = f(t) = 128t - 16t².
(a) What is the average velocity of the ball over the following time intervals?
[3,4]
[3, 3.5]
[3, 3.1]
ft/sec
ft/sec
ft/sec
(b) What is the instantaneous velocity at time t = 3?
ft/sec
(c) What is the instantaneous velocity at time t = 7?
ft/sec
Is the ball rising or falling at this time?
O rising
falling
(d) When will the ball hit the ground?
t =
sec
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Chapter A Solutions
Discrete Mathematics
Ch. A.1 - Prob. 1ECh. A.1 - Prob. 2ECh. A.1 - Prob. 3ECh. A.1 - Prob. 4ECh. A.1 - Prob. 5ECh. A.1 - Prob. 6ECh. A.1 - Prob. 7ECh. A.1 - Prob. 8ECh. A.1 - Prob. 9ECh. A.1 - Prob. 10E
Ch. A.1 - Prob. 11ECh. A.1 - Prob. 12ECh. A.1 - Prob. 13ECh. A.1 - Prob. 14ECh. A.1 - Prob. 15ECh. A.1 - Prob. 16ECh. A.1 - Write the negations of the statements in Exercises...Ch. A.1 - Prob. 18ECh. A.1 - Prob. 19ECh. A.1 - Prob. 20ECh. A.1 - Prob. 21ECh. A.1 - Prob. 22ECh. A.1 - Prob. 23ECh. A.1 - Prob. 24ECh. A.1 - Prob. 25ECh. A.1 - Prob. 26ECh. A.1 - Prob. 27ECh. A.1 - Prob. 28ECh. A.1 - Prob. 29ECh. A.1 - Prob. 30ECh. A.1 - Prob. 31ECh. A.1 - Prob. 32ECh. A.1 - Prob. 33ECh. A.1 - Prob. 34ECh. A.1 - Prob. 35ECh. A.1 - Prob. 36ECh. A.2 - Prob. 1ECh. A.2 - In Exercises 1–10, construct a truth table for...Ch. A.2 - In Exercises 1–10, construct a truth table for...Ch. A.2 - Prob. 4ECh. A.2 - Prob. 5ECh. A.2 - Prob. 6ECh. A.2 - Prob. 7ECh. A.2 - Prob. 8ECh. A.2 - Prob. 9ECh. A.2 - Prob. 10ECh. A.2 - Prob. 11ECh. A.2 - Prob. 12ECh. A.2 - Prob. 13ECh. A.2 - Prob. 14ECh. A.2 - Prob. 15ECh. A.2 - Prob. 16ECh. A.2 - Prob. 17ECh. A.2 - Prob. 18ECh. A.2 - Prob. 19ECh. A.2 - Prob. 20ECh. A.2 - Prob. 21ECh. A.2 - Prob. 22ECh. A.2 - Prob. 23ECh. A.2 - Prob. 24ECh. A.2 - Prob. 25ECh. A.2 - Prob. 26ECh. A.2 - Prob. 27ECh. A.2 - Prob. 28ECh. A.2 - Prob. 29ECh. A.2 - The statement [(p → q) ∧ ~q] → ~p is called modus...Ch. A.2 - Prob. 31ECh. A.2 - Prob. 32ECh. A.2 - Prob. 33ECh. A.2 - Prob. 34ECh. A.3 - Prove that ~(p ∧ ~q) is logically equivalent to p...Ch. A.3 - Prove that the law of syllogism is a tautology.
Ch. A.3 - Prove that if m is an integer and m2 is odd, then...Ch. A.3 - Prove, as in Example A.14, that there is no...Ch. A.3 - Prove the theorems in Exercises 5–12. Assume that...Ch. A.3 - Prove the theorems in Exercises 5–12. Assume that...Ch. A.3 - Prove the theorems in Exercises 5–12. Assume that...Ch. A.3 - Prove the theorems in Exercises 5–12. Assume that...Ch. A.3 - Prove the theorems in Exercises 5-12. Assume that...Ch. A.3 - Prove the theorems in Exercises 5–12. Assume that...Ch. A.3 - Prove the theorems in Exercises 5-12. Assume that...Ch. A.3 - Prove the theorems in Exercises 5-12. Assume that...Ch. A.3 - Prove or disprove the results in Exercises 13–22....Ch. A.3 - Prove or disprove the results in Exercises 13–22....Ch. A.3 - Prove or disprove the results in Exercises 13–22....Ch. A.3 - Prove or disprove the results in Exercises 13–22....Ch. A.3 - Prove or disprove the results in Exercises 13–22....Ch. A.3 - Prove or disprove the results in Exercises 13-22....Ch. A.3 - Prove or disprove the results in Exercises 13–22....Ch. A.3 - Prove or disprove the results in Exercises 13-22....Ch. A.3 - Prob. 21ECh. A.3 - Prob. 22ECh. A.3 - Prob. 23ECh. A.3 - Prob. 24ECh. A.3 - Prob. 25ECh. A.3 - Prob. 26ECh. A.3 - Prob. 27ECh. A.3 - Prob. 28ECh. A - Prob. 1SECh. A - Prob. 2SECh. A - Prob. 3SECh. A - Prob. 4SECh. A - Prob. 5SECh. A - Prob. 6SECh. A - Prob. 7SECh. A - Prob. 8SECh. A - Prob. 9SECh. A - Prob. 10SECh. A - Prob. 11SECh. A - Prob. 12SECh. A - Prob. 13SECh. A - Prob. 14SECh. A - Prob. 15SECh. A - Prob. 16SECh. A - Prob. 17SECh. A - Prob. 18SECh. A - Prob. 19SECh. A - Prob. 20SECh. A - Prob. 21SECh. A - For each statement in Exercises 21–24, write (a)...Ch. A - Prob. 23SECh. A - Prob. 24SECh. A - Prob. 25SECh. A - Prob. 26SECh. A - Prob. 27SECh. A - Prob. 28SECh. A - Prob. 29SECh. A - Prob. 30SECh. A - Prob. 31SECh. A - Prob. 32SECh. A - Prob. 33SECh. A - Prob. 34SECh. A - Prob. 35SECh. A - Prob. 36SECh. A - Prob. 37SECh. A - Prob. 38SECh. A - Prob. 39SECh. A - Prob. 40SECh. A - Prob. 41SECh. A - Prob. 42SECh. A - Prob. 43SECh. A - Prob. 44SE
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