Introductory Combinatorics
5th Edition
ISBN: 9780136020400
Author: Richard A. Brualdi
Publisher: Prentice Hall
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Chapter 10, Problem 16E
To determine
The multiplicative inverse of 15 in
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Chapter 10 Solutions
Introductory Combinatorics
Ch. 10 - Prob. 1ECh. 10 - Prob. 2ECh. 10 - Prob. 3ECh. 10 - Prob. 4ECh. 10 - Prove that no two integers in Zn, arithmetic mod...Ch. 10 - Prob. 6ECh. 10 - Prob. 7ECh. 10 - Prob. 8ECh. 10 - Prob. 9ECh. 10 - Determine which integers in Z12 have...
Ch. 10 - Prob. 11ECh. 10 - Prob. 12ECh. 10 - Let n = 2m + 1 be an odd integer with m ≥ 2. Prove...Ch. 10 - Use the algorithm in Section 10.1 to find the GCD...Ch. 10 - For each of the pairs of integers in Exercise 14,...Ch. 10 - Apply the algorithm for the GCD in Section 10.1 to...Ch. 10 - Start with the field Z2 and show that x3 + x + 1...Ch. 10 - Does there exist a BIBD with parameters b = 10, v...Ch. 10 - Prob. 19ECh. 10 - Prob. 20ECh. 10 - Determine the complementary design of the BIBD...Ch. 10 - Prob. 22ECh. 10 - How are the incidence matrices of a BIBD and its...Ch. 10 - Show that a BIBD, with v varieties whose block...Ch. 10 - Prove that a BIBD with parameters b, v, k, r, λ...Ch. 10 - Let B be a difference set in Zn. Show that, for...Ch. 10 - Prob. 27ECh. 10 - Show that B = {0, 1, 3, 9} is a difference set in...Ch. 10 - Prob. 29ECh. 10 - Prob. 30ECh. 10 - Prob. 31ECh. 10 - Prob. 32ECh. 10 - Let t be a positive integer. Use Theorem 10.3.2 to...Ch. 10 - Let t be a positive integer. Prove that, if there...Ch. 10 - Assume a Steiner triple system exists with...Ch. 10 - Prob. 36ECh. 10 - Prove that, if we interchange the rows of a Latin...Ch. 10 - Use the method in Theorem 10.4.2 with n = 6 and r...Ch. 10 - Let n be a positive integer and let r be a nonzero...Ch. 10 - Let n be a positive integer and let r and rʹ be...Ch. 10 - Use the method in Theorem 10.4.2 with n = 8 and r...Ch. 10 - Construct four MOLS of order 5.
Ch. 10 - Prob. 43ECh. 10 - Construct two MOLS of order 9.
Ch. 10 - Prob. 45ECh. 10 - Construct two MOLS of order 8.
Ch. 10 - Prob. 47ECh. 10 - Prob. 48ECh. 10 - Prob. 49ECh. 10 - Let A1 and A2 be MOLS of order m and let B1 and B2...Ch. 10 - Construct a completion of the 3-by-6 Latin...Ch. 10 - Prob. 53ECh. 10 - Prob. 54ECh. 10 - Prob. 55ECh. 10 - Prob. 56ECh. 10 - Prob. 57ECh. 10 - Prob. 58ECh. 10 - Prob. 59ECh. 10 - Prob. 60ECh. 10 - Let , where m is a positive integer. Prove that...
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- No chatgpt pls will upvotearrow_forward(7) (12 points) Let F(x, y, z) = (y, x+z cos yz, y cos yz). Ꮖ (a) (4 points) Show that V x F = 0. (b) (4 points) Find a potential f for the vector field F. (c) (4 points) Let S be a surface in R3 for which the Stokes' Theorem is valid. Use Stokes' Theorem to calculate the line integral Jos F.ds; as denotes the boundary of S. Explain your answer.arrow_forward(3) (16 points) Consider z = uv, u = x+y, v=x-y. (a) (4 points) Express z in the form z = fog where g: R² R² and f: R² → R. (b) (4 points) Use the chain rule to calculate Vz = (2, 2). Show all intermediate steps otherwise no credit. (c) (4 points) Let S be the surface parametrized by T(x, y) = (x, y, ƒ (g(x, y)) (x, y) = R². Give a parametric description of the tangent plane to S at the point p = T(x, y). (d) (4 points) Calculate the second Taylor polynomial Q(x, y) (i.e. the quadratic approximation) of F = (fog) at a point (a, b). Verify that Q(x,y) F(a+x,b+y). =arrow_forward
- (6) (8 points) Change the order of integration and evaluate (z +4ry)drdy . So S√ ² 0arrow_forward(10) (16 points) Let R>0. Consider the truncated sphere S given as x² + y² + (z = √15R)² = R², z ≥0. where F(x, y, z) = −yi + xj . (a) (8 points) Consider the vector field V (x, y, z) = (▼ × F)(x, y, z) Think of S as a hot-air balloon where the vector field V is the velocity vector field measuring the hot gasses escaping through the porous surface S. The flux of V across S gives the volume flow rate of the gasses through S. Calculate this flux. Hint: Parametrize the boundary OS. Then use Stokes' Theorem. (b) (8 points) Calculate the surface area of the balloon. To calculate the surface area, do the following: Translate the balloon surface S by the vector (-15)k. The translated surface, call it S+ is part of the sphere x² + y²+z² = R². Why do S and S+ have the same area? ⚫ Calculate the area of S+. What is the natural spherical parametrization of S+?arrow_forward(1) (8 points) Let c(t) = (et, et sint, et cost). Reparametrize c as a unit speed curve starting from the point (1,0,1).arrow_forward
- (9) (16 points) Let F(x, y, z) = (x² + y − 4)i + 3xyj + (2x2 +z²)k = - = (x²+y4,3xy, 2x2 + 2²). (a) (4 points) Calculate the divergence and curl of F. (b) (6 points) Find the flux of V x F across the surface S given by x² + y²+2² = 16, z ≥ 0. (c) (6 points) Find the flux of F across the boundary of the unit cube E = [0,1] × [0,1] x [0,1].arrow_forward(8) (12 points) (a) (8 points) Let C be the circle x² + y² = 4. Let F(x, y) = (2y + e²)i + (x + sin(y²))j. Evaluate the line integral JF. F.ds. Hint: First calculate V x F. (b) (4 points) Let S be the surface r² + y² + z² = 4, z ≤0. Calculate the flux integral √(V × F) F).dS. Justify your answer.arrow_forwardDetermine whether the Law of Sines or the Law of Cosines can be used to find another measure of the triangle. a = 13, b = 15, C = 68° Law of Sines Law of Cosines Then solve the triangle. (Round your answers to four decimal places.) C = 15.7449 A = 49.9288 B = 62.0712 × Need Help? Read It Watch Itarrow_forward
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