Introductory Combinatorics
5th Edition
ISBN: 9780134689616
Author: Brualdi, Richard A.
Publisher: Pearson,
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Chapter 4, Problem 27E
To determine
The 3-subsets of
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2) If Mand N be two water hyper Plane ofx
Show that MUN and MN is hy Per Plane
ofx with prove and Examplame.
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3) IS AUB is convex set and affine set
or blensed set or symmetre setorsubsie....
Show that A and B is convex or affine
or Hensedsed or symmetivce or subspace.
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Prove or ExPlane Mand Nave independend.
or not.
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D.E. for mixture problems:
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Chapter 4 Solutions
Introductory Combinatorics
Ch. 4 - Prob. 1ECh. 4 - Determine the mobile integers in
.
Ch. 4 - Use the algorithm of Section 4.1 to generate the...Ch. 4 - Prove that in the algorithm of Section 4.1, which...Ch. 4 - Let i1i2 … in be a permutation of {1, 2, …, n}...Ch. 4 - Determine the inversion sequences of the following...Ch. 4 - Construct the permutations of {1, 2, …,8} whose...Ch. 4 - How many permutations of {1, 2, 3, 4, 5, 6}...Ch. 4 - Show that the largest number of inversions of a...Ch. 4 - Bring the permutations 256143 and 436251 to 123456...
Ch. 4 - Let S = {x7, x6,…, x1, x0}. Determine the 8-tuples...Ch. 4 - Let S = {x7, x6,…, x1, x0}. Determine the subsets...Ch. 4 - Generate the 5-tuples of 0s and 1s by using the...Ch. 4 - Prob. 14ECh. 4 - For each of the following subsets of {x7, x6, …,...Ch. 4 - For each of the subsets (a), (b), (c), and (d) in...Ch. 4 - Which subset of {x7, x6, … , x1, x0} is 150th on...Ch. 4 - Build (the corners and edges of) the 4-cube, and...Ch. 4 - Give an example of a noncyclic Gray code of order...Ch. 4 - Prob. 20ECh. 4 - Construct the reflected Gray code of order 5...Ch. 4 - Prob. 22ECh. 4 - Determine the immediate successors of the...Ch. 4 - Prob. 24ECh. 4 - Prob. 26ECh. 4 - Prob. 27ECh. 4 - Prob. 28ECh. 4 - Determine the 7-subset of {1, 2, … , 15} that...Ch. 4 - Generate the inversion sequences of the...Ch. 4 - Prob. 31ECh. 4 - Generate the 4-permutations of {1, 2, 3, 4, 5,...Ch. 4 - In which position does the subset 2489 occur in...Ch. 4 - Consider the r-subsets of {1, 2, …, n} in...Ch. 4 - The complement of an r-subset A of {1, 2, … , n}...Ch. 4 - Prob. 36ECh. 4 - Let R′ and R″ be two partial orders on a set X....Ch. 4 - Let (X1, ≤1) and (X2, ≤2) be partially ordered...Ch. 4 - Let (J, ≤) be the partially ordered set with J =...Ch. 4 - Prob. 40ECh. 4 - Show that a partial order on a finite set is...Ch. 4 - Describe the cover relation for the partial order...Ch. 4 - Prob. 43ECh. 4 - Prob. 44ECh. 4 - Prob. 45ECh. 4 - Let m be a positive integer and define a relation...Ch. 4 - Consider the partial order ≤ on the set X of...Ch. 4 - Prob. 50ECh. 4 - Let n be a positive integer, and let Xn be the set...Ch. 4 - Verify that a binary n-tuple an − 1, ⋯ ,a1a0 is in...Ch. 4 - Continuing with Exercise 52, show that can be...Ch. 4 - Let (X, ≤) be a finite partially ordered set. By...Ch. 4 - Prob. 56ECh. 4 - Prob. 57ECh. 4 - Prob. 58ECh. 4 - Prob. 59E
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- - Suppose that you have the differential equation: dy = (y - 2) (y+3) dx a. What are the equilibrium solutions for the differential equation? b. Where is the differential equation increasing or decreasing? Show how you know. Showing them on the drawing is not enough. c. Where are the changes in concavity for the differential equation? Show how you know. Showing them on the drawing is not enough. d. Consider the slope field for the differential equation. Draw solution curves given the following initial conditions: i. y(0) = -5 ii. y(0) = -1 iii. y(0) = 2arrow_forward5. Suppose that a mass of 5 stretches a spring 10. The mass is acted on by an external force of F(t)=10 sin () and moves in a medium that gives a damping coefficient of ½. If the mass is set in motion with an initial velocity of 3 and is stretched initially to a length of 5. (I purposefully removed the units- don't worry about them. Assume no conversions are needed.) a) Find the equation for the displacement of the spring mass at time t. b) Write the equation for the displacement of the spring mass in phase-mode form. c) Characterize the damping of the spring mass system as overdamped, underdamped or critically damped. Explain how you know. D.E. for Spring Mass Systems k m* g = kLo y" +—y' + — —±y = —±F(t), y(0) = yo, y'(0) = vo m 2 A₁ = √c₁² + C₂² Q = tan-1arrow_forward4. Given the following information determine the appropriate trial solution to find yp. Do not solve the differential equation. Do not find the constants. a) (D-4)2(D+ 2)y = 4e-2x b) (D+ 1)(D² + 10D +34)y = 2e-5x cos 3xarrow_forward
- 9.7 Given the equations 0.5x₁-x2=-9.5 1.02x₁ - 2x2 = -18.8 (a) Solve graphically. (b) Compute the determinant. (c) On the basis of (a) and (b), what would you expect regarding the system's condition? (d) Solve by the elimination of unknowns. (e) Solve again, but with a modified slightly to 0.52. Interpret your results.arrow_forward3. Determine the appropriate annihilator for the given F(x). a) F(x) = 5 cos 2x b) F(x)=9x2e3xarrow_forward12.42 The steady-state distribution of temperature on a heated plate can be modeled by the Laplace equation, 0= FT T + 200°C 25°C 25°C T22 0°C T₁ T21 200°C FIGURE P12.42 75°C 75°C 00°C If the plate is represented by a series of nodes (Fig. P12.42), cen- tered finite-divided differences can be substituted for the second derivatives, which results in a system of linear algebraic equations. Use the Gauss-Seidel method to solve for the temperatures of the nodes in Fig. P12.42.arrow_forward
- 9.22 Develop, debug, and test a program in either a high-level language or a macro language of your choice to solve a system of equations with Gauss-Jordan elimination without partial pivoting. Base the program on the pseudocode from Fig. 9.10. Test the program using the same system as in Prob. 9.18. Compute the total number of flops in your algorithm to verify Eq. 9.37. FIGURE 9.10 Pseudocode to implement the Gauss-Jordan algorithm with- out partial pivoting. SUB GaussJordan(aug, m, n, x) DOFOR k = 1, m d = aug(k, k) DOFOR j = 1, n aug(k, j) = aug(k, j)/d END DO DOFOR 1 = 1, m IF 1 % K THEN d = aug(i, k) DOFOR j = k, n aug(1, j) END DO aug(1, j) - d*aug(k, j) END IF END DO END DO DOFOR k = 1, m x(k) = aug(k, n) END DO END GaussJordanarrow_forward11.9 Recall from Prob. 10.8, that the following system of equations is designed to determine concentrations (the e's in g/m³) in a series of coupled reactors as a function of amount of mass input to each reactor (the right-hand sides are in g/day): 15c3cc33300 -3c18c26c3 = 1200 -4c₁₂+12c3 = 2400 Solve this problem with the Gauss-Seidel method to & = 5%.arrow_forward9.8 Given the equations 10x+2x2-x3 = 27 -3x-6x2+2x3 = -61.5 x1 + x2 + 5x3 = -21.5 (a) Solve by naive Gauss elimination. Show all steps of the compu- tation. (b) Substitute your results into the original equations to check your answers.arrow_forward
- Tangent planes Find an equation of the plane tangent to the following surfaces at the given points (two planes and two equations).arrow_forwardVectors u and v are shown on the graph.Part A: Write u and v in component form. Show your work. Part B: Find u + v. Show your work.Part C: Find 5u − 2v. Show your work.arrow_forwardVectors u = 6(cos 60°i + sin60°j), v = 4(cos 315°i + sin315°j), and w = −12(cos 330°i + sin330°j) are given. Use exact values when evaluating sine and cosine.Part A: Convert the vectors to component form and find −7(u • v). Show every step of your work.Part B: Convert the vectors to component form and use the dot product to determine if u and w are parallel, orthogonal, or neither. Justify your answer.arrow_forward
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