Section 4.1

• 2. 999
• 4. 72
• 6. 24
• 8. 15,600
• 10. 256
• 12. 126. (Use expression for geometric series in Section 3.2)
• 14. 2^(n-2) for n >= 2
• 16. 66,351
• 18. a) 1,000. b) 4,500. c) 4,536. d) 3,000. e) 2,829. f) 6,171. g) 1,543. h) 257.
• 20. a) 5,040. b) 5,000. c) 36.
• 22. 35,152,000
• 24. 63,273,600
• 26. a) 2^10 b) 3^10 c) 4^10 d) 5^10
• 28. 2^n
• 32. 2^100 - 101
• 34. a) 10x9x8x7x6x5 - 9x8x7x6x5x4. b) 10x9x8x7x6x5 - 8x7x6x5x4x3. c) 2x(answer from part a) - 2x(answer from part b)
• 36. 2^5 + 2^4 - 2^2
• 38. 2(2^5 + 5*2^4) - 2
• 42. 52 Sum(i=1 to 8) 63^(i-1) = 52(63^8-1)/(63-1)
• 44. 13 leaves