Mathematics For Machine Technology
8th Edition
ISBN: 9781337798310
Author: Peterson, John.
Publisher: Cengage Learning,
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Chapter 13, Problem 9A
Divide the numbers in Exercises 7 through 9. Express the answers to the indicated number of decimal places.
9.a.
b.
c.
d.
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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?
Shading a Venn diagram with 3 sets: Unions, intersections, and...
The Venn diagram shows sets A, B, C, and the universal set U.
Shade (CUA)' n B on the Venn diagram.
U
Explanation
Check
A-
B
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Chapter 13 Solutions
Mathematics For Machine Technology
Ch. 13 - Prob. 1ACh. 13 - Express the common fraction 44125 as a decimal...Ch. 13 - Prob. 3ACh. 13 - Use Figure 132 to answer Exercises 4 through 6....Ch. 13 - Use Figure 132 to answer Exercises 4 through 6....Ch. 13 - Use Figure 132 to answer Exercises 4 through 6....Ch. 13 - Prob. 7ACh. 13 - Divide the numbers in Exercises 7 through 9....Ch. 13 - Divide the numbers in Exercises 7 through 9....Ch. 13 - As indicated in Figure 133, rack sizes are given...
Ch. 13 - Four sets of equally spaced holes are shown in the...Ch. 13 - A cross-sectional view of a bevel gear is shown in...Ch. 13 - How many complete bushings each 14.60 millimeters...Ch. 13 - A shaft is being cut in a lathe. The tool feeds...Ch. 13 - How much stock per stroke is removed by the wheel...Ch. 13 - An automatic screw machine is capable of producing...Ch. 13 - The bolt in Figure 136 has 7.7 threads. Determine...Ch. 13 - The block in Figure 13-7 has a threaded hole with...Ch. 13 - The length of a side of a square equals the...Ch. 13 - All sections of the block in Figure 13-9 are equal...
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- 2 6. Modelling. Suppose that we have two tanks (A and B) between which a mixture of brine flows. Tank A contains 200 liters of water in which 50 kilograms of salt has been dissolved and Tank B contains 100 liters of pure water. Water containing 1kg of salt per liter is pumped into Tank A at the rate of 5 liters per minute. Brine mixture is pumped into Tank A from Tank B at the rate of 3 liters per minute and brine mixture is pumped from Tank A into Tank B at the rate of 8 liters per minute. Brine is drained from Tank B at a rate of 5 liters per minute. (a) Draw and carefully label a picture of the situation, including both tanks and the flow of brine between them. JankA 1ks of Salt Slits Pump EL Brine mit tark A from tank 13 Tank 13 k 3L zooliters of Ico liters of water with pure water. Saky salt → 777 disslore inside Brine mix is pumped from tank A to B of 82 Brine drainen min by Gf salt (b) Assume all brine mixtures are well-stirred. If we let t be the time in minutes, let x(t) 1ks…arrow_forwardNo chatgpt plsarrow_forwardRemix 4. Direction Fields/Phase Portraits. Use the given direction fields to plot solution curves to each of the given initial value problems. (a) x = x+2y 1111 y = -3x+y with x(0) = 1, y(0) = -1 (b) Consider the initial value problem corresponding to the given phase portrait. x = y y' = 3x + 2y Draw two "straight line solutions" passing through (0,0) (c) Make guesses for the equations of the straight line solutions: y = ax.arrow_forward
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