Practice Workbook Answers (continued) d. A(2,3) + A(4,15) 2(4x 15) 3 8x 27 A(8,27); A(4,15) + A(2,3) 4(2x 3) 15 8x 27 A(8,27); the result of the compositions are the same even though the affine transformations are not in the same order. 6. a. 3. a. A(1,8)(4) 1(4) 8 4 8 4; A(3,8)(4) 3(4) 8 12 8 4 b. AA(1,8) + A(3,8)B(4) A(1,8)(4) 4 because each step in the composition is in S4 and therefore returns an output of 4. Similarly, AA(3,8) + A(1,8)B(4) A(3,8)(4) 4. c. From part (a), A(1,8)(4) 4. Apply AA(1,8)B1 to each side of the equation to get 4 AA(1,8)B1(4). Similarly, apply AA(3,8)B1 to each side of A(3,8)(4) 4 to get 4 AA(3,8)B1. So AA(1,8)B1 and AA(3,8)B1 are both in S4. b. 4 y 2 x 4 O 2 2 4 2 4 2 4 4 y 2 x 4 O 2 2 c. y 4 2 x 4 2 O 2 4 2 4. a. AT2 + D5 + AT2B1B(2) AT2 + D5B(0) T2(0) 2 b. AT2 + D3 + AT2B1B(2) AT2 + D3B(0) T2(0) 2 c. AT2 + D1 + AT2B1B(2) AT2 + D1B(0) T2(0) 2 d. AT2 + Da + AT2B1B(2) AT2 + DaB(0) T2(0) 2 Chapter 7 Lesson 7.2 Additional Practice 1. a. 21 c. 125,250 b. 78 2. 2n 2 n 5. a. A(81,80) b. To compute f (4), start with f (0) and apply the recursion step, A(3,2), to it four times. c. 1 3. 74 n(n 1 1) 2 3n(3n 1 1) c. 2 4. a. CME Project • Algebra 2 Teaching Resources © Pearson Education, Inc. All rights reserved. 181 b. n(2n 1) d. kn(kn 1 2) 8 Practice Workbook Answers 5. n 5. <0.9999999404 g(n) 0 1 1 4 3 2 13 9 3 40 27 4 121 81 5 364 243 6. a. 20 d. 51 2. a. 619 4. a. 420 b. 255 n(n 1 1) 2 2 n(n 1 1) b. 2 1 2 d. 6630 7. a b. 1,594,296 7 7 c. 10 3 a 10 2 Q 10 R b < 2.267 Lessons 7.3 and 7.4 Additional Practice r (n) 0 1 1 1 4 5 2 7 12 3 10 22 c. 5n n(n 1 1) n(n 1 1) b 2 2 1. a. 153 c. 2n 2 3n 2 e. 2186 b. 125 d. 1093 f. 3n1 1 2. a. 280 c. 40 b. 224 d. 89,153 3. r(n) 6x 5 (n 1 1)(3n 1 2) 2 4. No; since you want the polynomial to agree with s for all integers n 0, there is only one way to get the set of running totals with a polynomial function. n 2. Answers may vary. Sample: 1 Q 16 R 1 ; 21 b. 64 64 c. 1n ; 13 a1 1nb 4 4 5. 83,166 n d. 5n Lessons 7.7 and 7.8 Additional Practice b. r(n) 3n 1 c. Answers may vary. Sample: 1; 5 3. a. 16 16 b. 40 8. a. 11,718 b. 22,888,183,593 c. 22,888,171,875 d. 34 (5n1 1) 11 n b. 72 5. a. 3 6. a. 40 c. 1824 7. a. 797,148 4. a. a 1j j=1 4 b. 103 3. n(n 1) 1 2 Q1 3R g(n) 1 2 Q1 3R 12 c. 50 f. 32 2 1. 3n 2 24n 2 1 n 1. a. b. 80 e. 165 Lesson 7.6 Additional Practice Answers may vary. Sample: 6. a. 35 (continued) b. a 1j j=1 4 6. F(n) 16 ` c. a 1j j=1 4 n(3n 2 1) 2 CME Project • Algebra 2 Teaching Resources © Pearson Education, Inc. All rights reserved. 182 Practice Workbook Answers 7. a. n t (n) 0 6 1 1 7 3 2 10 5 3 15 t(n) e Lessons 7.12 and 7.13 Additional Practice 32 64 1. a. sequence: 12, 8, 16 3 , 9 , 27 ; 7 ; yes; 36. series: 12, 20, 2513, 2889, 3127 6 t(n 2 1) 1 2n 2 1 b. sequence: 6, 12, 24, 48, 96; series: 6, 6, 18, 30, 66; no c. sequence: 16, 6.4, 2.56, 1.024, 0.4096; series: 16, 22.4, 24.96, 25.984, 26.3936; yes; 26.67 d. sequence: 15, 22.5, 33.75, 50.625, 75.9375; series: 15, 37.5, 71.25, 121.875, 197.8125; no if n 0 if n 0 b. T(n) 6 n 2 n 8. a. r(n) a 3k k=0 (continued) b. 12 A3n1 1B Lessons 7.10 and 7.11 Additional Practice 2. a. 1. a. 58 b. 7n 5 c. Yes; it is the 269th term. 2. 1, 4, 7, 10, 13, 16 3. 16, 12, 8, 4, 0 Stage 3 4. a. 6,144 b. <153.77 c. 128 125 b. Stage 1: 53 ; Stage 2: 25 9 ; Stage 3: 27 5. a. 12(2)n1 d. No; as n increases, Q 53 R gets larger b. 4 Q 32 R n c. Q 53 R n and larger without bound. n21 3. a. 16 7 < 2.286 b. 10 c. 4"2 A"2 B n1 6. a. 21 sit-ups b. 107 sit-ups c. 10(1.2)w1 sit-ups 45 4. a. a 1000 1 b. r 1000 5 c. 111 7. $25,848 8. a. <0.78 ft b. <87.66 ft c. <58.43 ft d. 150 ft 26 5. a. 33 d. 17 99 b. 13 33 7 c. 333 7 e. 11 115 f. 333 Lesson 7.15 Additional Practice 1. a. 16 c. 512 CME Project • Algebra 2 Teaching Resources © Pearson Education, Inc. All rights reserved. 183 b. 256 d. 2048 Practice Workbook Answers 5. n 1 entries 2. There are 45 even numbers in row 60. There are 75 even numbers in row 90. Answers may vary. Sample: To find the number of even numbers in a given row, find how many numbers are in that row and how many are odd. Row k has a total of k 1 numbers. In row k there are 2n odd numbers, where n is the number of 1’s if k is written in binary form. Thus, row k has k 1 2n even numbers. Row 60 has 61 numbers in it. To find the number of odd numbers in row 60, write 60 inbinary as 111100 (32 16 8 4). There are four 1’s in the binary representation, so there are 24 16 odd numbers. Row 60 has 61 16 45 even numbers (60 1 24 45). 6. a. row 0: 1, row 1: 2, row 2: 4, row 3: 8, row 4: 16, row 5: 32; the sum of each row n is 2n. b. 2048 7. 5005 Lesson 7.16 Additional Practice 1. a. 256x 8 1024x7y 1792x 6y 2 1792x 5y 3 1120x 4y 4 448x 3y 5 112x 2y 6 16xy7 y 8 b. x 6 18x 5y 135x 4y 2 540x 3y 3 1215x 2y 4 1458xy 5 729y 6 c. 256x 8 3072x7y 16,128x 6y 2 48,384x 5y 3 90,720x 4y 4 108,864x 3y 5 81,648x 2y 6 34,992xy7 6561y 8 d. 729x 6 5832x 5y 19,440x 4y 2 34,560x 3y 3 34,560x 2y 4 18,432xy 5 4096y 6 3. a. m 4, 5 b. m 4, 1 c. m 5, 9 d. m 49, n 9, 40 4. 1 1 1 1 1 1 1 1 1 1 1 7 8 9 4 5 6 3 1 3 6 1 b. a 5b 4 c. none 3. a. 66 b. 495 c. 792 5. a. 0 4 10 10 2. a. 126 4. a. 1,031,250,000 b. 1,237,500,000 c. 792,000,000 1 2 (continued) 1 5 6. Answers may vary. Sample: x 6 12x 5 60x 4 160x 3 240x 2 192x 64 factors to (x 2)6. 1 15 20 15 6 21 35 35 21 1 7 28 56 70 56 28 36 84 126 126 84 36 b. 0; 0; 0 1 8 7. a. 350 b. (3)100 3100 1 9 10 45 120 210 252 210 120 45 10 1 1 Answers may vary. Sample: The first and last entry of each row is 1. To find each remaining entry in the row, add the two consecutive entries directly above it. CME Project • Algebra 2 Teaching Resources © Pearson Education, Inc. All rights reserved. 184
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