Introductory Combinatorics
5th Edition
ISBN: 9780134689616
Author: Brualdi, Richard A.
Publisher: Pearson,
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Chapter 8, Problem 7E
To determine
The
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(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.
Determine 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
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(4) (10 points) Evaluate
√(x² + y² + z²)¹⁄² exp[}(x² + y² + z²)²] dV
where D is the region defined by 1< x² + y²+ z² ≤4 and √√3(x² + y²) ≤ z.
Note: exp(x² + y²+ 2²)²] means el (x²+ y²+=²)²]¸
Chapter 8 Solutions
Introductory Combinatorics
Ch. 8 - Let 2n(equally spaced) points on a circle be...Ch. 8 - Prove that the number of 2-by-n arrays
that can...Ch. 8 - Write out all of the multiplication schemes for...Ch. 8 - 5. * Let m and n be nonnegative integers with n ≥...Ch. 8 - 6. Let the sequence h0, h1, … , hn, … be defined...Ch. 8 - 7. The general term hn of a sequence is a...Ch. 8 - 8. Find the sum of the fifth powers of the first n...Ch. 8 - 9. Prove that the following formula holds for the...Ch. 8 - 10. If hn is a polynomial in n of degree m, prove...Ch. 8 - 11. Compute the Stirling numbers of the second...
Ch. 8 - 12. Prove that the Stirling numbers of the second...Ch. 8 - 13. Let X be a p-element set and let Y be a...Ch. 8 - Prob. 14ECh. 8 - 15. The number of partitions of a set of n...Ch. 8 - 11. Compute the Stirling numbers of the second...Ch. 8 - 17. Compute the triangle of Stirling numbers of...Ch. 8 - Write [n]k as a polynomial in n for k = 5, 6, and...Ch. 8 - Prove that the Stirling numbers of the first kind...Ch. 8 - Verify that [n]n = n!, and write n! as a...Ch. 8 - For each integer n = 1, 2, 3, 4, 5, construct the...Ch. 8 - Prob. 22ECh. 8 - Prob. 23ECh. 8 - Prob. 24ECh. 8 - Prob. 25ECh. 8 - Determine the conjugate of each of the following...Ch. 8 - For each integer n > 2, determine a self-conjugate...Ch. 8 - Prove that conjugation reverses the order of...Ch. 8 - Prove that the number of partitions of the...Ch. 8 - Prove that the partition function satisfies
Ch. 8 - Prob. 32ECh. 8 - Prob. 33ECh. 8 - Prob. 34ECh. 8 - Prob. 35ECh. 8 - 36. Prove that the Catalan number Cn equals the...
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- (2) (12 points) Let f(x,y) = x²e¯. (a) (4 points) Calculate Vf. (b) (4 points) Given x directional derivative 0, find the line of vectors u = D₁f(x, y) = 0. (u1, 2) such that the - (c) (4 points) Let u= (1+3√3). Show that Duƒ(1, 0) = ¦|▼ƒ(1,0)| . What is the angle between Vf(1,0) and the vector u? Explain.arrow_forwardFind the missing values by solving the parallelogram shown in the figure. (The lengths of the diagonals are given by c and d. Round your answers to two decimal places.) a b 29 39 66.50 C 17.40 d 0 54.0 126° a Ꮎ b darrow_forwardAnswer the following questions related to the following matrix A = 3 ³).arrow_forward
- (5) (10 points) Let D be the parallelogram in the xy-plane with vertices (0, 0), (1, 1), (1, 1), (0, -2). Let f(x,y) = xy/2. Use the linear change of variables T(u, v)=(u,u2v) = (x, y) 1 to calculate the integral f(x,y) dA= 0 ↓ The domain of T is a rectangle R. What is R? |ǝ(x, y) du dv. |ð(u, v)|arrow_forward2 Anot ined sove in peaper PV+96252 Q3// Find the volume of the region between the cylinder z = y2 and the xy- plane that is bounded by the planes x=1, x=2,y=-2,andy=2. vertical rect a Q4// Draw and Evaluate Soxy-2sin (ny2)dydx D Lake tarrow_forwardDetermine whether the Law of Sines or the Law of Cosines can be used to find another measure of the triangle. B 13 cm 97° Law of Sines Law of Cosines A 43° Then solve the triangle. (Round your answers to two decimal places.) b = x C = A = 40.00arrow_forward
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