Numerical Analysis
10th Edition
ISBN: 9781305730663
Author: Richard L. Burden; J. Douglas Faires; Annette M. Burden
Publisher: Cengage Learning US
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Textbook Question
Chapter 1.1, Problem 3ES
Find intervals containing solutions to the following equations.
- a. x − 2−x = 0
- b. 2x cos(2x) − (x + 1)2 = 0
- c. 3x − ex = 0
- d. x + 1 − 2 sin(πx) = 0
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Problem 11 (a) A tank is discharging water through an orifice at a depth of T
meter below the surface of the water whose area is A m². The
following are the values of a for the corresponding values of A:
A 1.257 1.390
x 1.50 1.65
1.520 1.650 1.809 1.962 2.123 2.295 2.462|2.650
1.80 1.95 2.10 2.25 2.40 2.55 2.70
2.85
Using the formula
-3.0
(0.018)T =
dx.
calculate T, the time in seconds for the level of the water to drop
from 3.0 m to 1.5 m above the orifice.
(b) The velocity of a train which starts from rest is given by the fol-
lowing table, the time being reckoned in minutes from the start
and the speed in km/hour:
| † (minutes) |2|4 6 8 10 12
14 16 18 20
v (km/hr) 16 28.8 40 46.4 51.2 32.0 17.6 8 3.2 0
Estimate approximately the total distance ran in 20 minutes.
-
Let n = 7, let p = 23 and let S be the set of least positive residues mod p of the first (p − 1)/2
multiple of n, i.e.
n mod p, 2n mod p, ...,
p-1
2
-n mod p.
Let T be the subset of S consisting of those residues which exceed p/2.
Find the set T, and hence compute the Legendre symbol (7|23).
23
32
how come?
The first 11 multiples of 7 reduced mod 23 are
7, 14, 21, 5, 12, 19, 3, 10, 17, 1, 8.
The set T is the subset of these residues exceeding
So T = {12, 14, 17, 19, 21}.
By Gauss' lemma (Apostol Theorem 9.6),
(7|23) = (−1)|T| = (−1)5 = −1.
Let n = 7, let p = 23 and let S be the set of least positive residues mod p of the first (p-1)/2
multiple of n, i.e.
n mod p, 2n mod p, ...,
2
p-1
-n mod p.
Let T be the subset of S consisting of those residues which exceed p/2.
Find the set T, and hence compute the Legendre symbol (7|23).
The first 11 multiples of 7 reduced mod 23 are
7, 14, 21, 5, 12, 19, 3, 10, 17, 1, 8.
23
The set T is the subset of these residues exceeding
2°
So T = {12, 14, 17, 19, 21}.
By Gauss' lemma (Apostol Theorem 9.6),
(7|23) = (−1)|T| = (−1)5 = −1.
how come?
Chapter 1 Solutions
Numerical Analysis
Ch. 1.1 - Show that the following equations have at least...Ch. 1.1 - Show that the following equations have at least...Ch. 1.1 - Find intervals containing solutions to the...Ch. 1.1 - Find intervals containing solutions to the...Ch. 1.1 - Find maxaxb |f(x)| for the following functions and...Ch. 1.1 - Find maxaxb | f(x)| for the following functions...Ch. 1.1 - Show that f(x) is 0 at least once in the given...Ch. 1.1 - Suppose f C[a, b] and f (x) exists on (a, b)....Ch. 1.1 - Let f(x) = x3. a. Find the second Taylor...Ch. 1.1 - Find the third Taylor polynomial P3(x) for the...
Ch. 1.1 - Find the second Taylor polynomial P2(x) for the...Ch. 1.1 - Repeat Exercise 11 using x0 = /6. 11. Find the...Ch. 1.1 - Prob. 13ESCh. 1.1 - Prob. 14ESCh. 1.1 - Prob. 15ESCh. 1.1 - Use the error term of a Taylor polynomial to...Ch. 1.1 - Use a Taylor polynomial about /4 to approximate...Ch. 1.1 - Let f(x) = (1 x)1 and x0 = 0. Find the nth Taylor...Ch. 1.1 - Let f(x) = ex and x0 = 0. Find the nth Taylor...Ch. 1.1 - Prob. 20ESCh. 1.1 - The polynomial P2(x)=112x2 is to be used to...Ch. 1.1 - Use the Intermediate Value Theorem 1.11 and Rolles...Ch. 1.1 - Prob. 23ESCh. 1.1 - In your own words, describe the Lipschitz...Ch. 1.2 - Compute the absolute error and relative error in...Ch. 1.2 - Compute the absolute error and relative error in...Ch. 1.2 - Prob. 3ESCh. 1.2 - Find the largest interval in which p must lie to...Ch. 1.2 - Perform the following computations (i) exactly,...Ch. 1.2 - Use three-digit rounding arithmetic to perform the...Ch. 1.2 - Use three-digit rounding arithmetic to perform the...Ch. 1.2 - Repeat Exercise 7 using four-digit rounding...Ch. 1.2 - Repeat Exercise 7 using three-digit chopping...Ch. 1.2 - Prob. 10ESCh. 1.2 - Prob. 11ESCh. 1.2 - Prob. 12ESCh. 1.2 - Let f(x)=xcosxsinxxsinx. a. Find limx0 f(x). b....Ch. 1.2 - Let f(x)=exexx. a. Find limx0(ex ex )/x. b. Use...Ch. 1.2 - Use four-digit rounding arithmetic and the...Ch. 1.2 - Prob. 16ESCh. 1.2 - Prob. 17ESCh. 1.2 - Repeat Exercise 16 using four-digit chopping...Ch. 1.2 - Use the 64-bit-long real format to find the...Ch. 1.2 - Prob. 23ESCh. 1.2 - Discuss the difference between the arithmetic...Ch. 1.2 - Prob. 2DQCh. 1.2 - Discuss the various different ways to round...Ch. 1.2 - Discuss the difference between a number written in...Ch. 1.3 - The Maclaurin series for the arctangent function...Ch. 1.3 - Prob. 4ESCh. 1.3 - Prob. 5ESCh. 1.3 - Find the rates of convergence of the following...Ch. 1.3 - Find the rates of convergence of the following...Ch. 1.3 - Prob. 8ESCh. 1.3 - Prob. 9ESCh. 1.3 - Suppose that as x approaches zero,...Ch. 1.3 - Prob. 11ESCh. 1.3 - Prob. 12ESCh. 1.3 - Prob. 13ESCh. 1.3 - Prob. 14ESCh. 1.3 - a. How many multiplications and additions are...Ch. 1.3 - Write an algorithm to sum the finite series i=1nxi...Ch. 1.3 - Construct an algorithm that has as input an...Ch. 1.3 - Let P(x) = anxn + an1xn1 + + a1x + a0 be a...Ch. 1.3 - Prob. 4DQCh. 1.3 - Prob. 5DQCh. 1.3 - Prob. 6DQ
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