14. a, -8, r 2 16. a, - 6, r= - 18. a, = 2,r= a 1 20. a, = 4, r = - V2

Calculus: Early Transcendentals
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Author:James Stewart
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Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Number 14 , 16, and 20 

**Geometric Sequences: Exercises and Solutions**

### Writing the Terms of a Geometric Sequence

**Instructions:** In Exercises 13–22, write the first five terms of the geometric sequence.

1. **Exercise 13:** \( a_1 = 4, \, r = 3 \)

2. **Exercise 14:** \( a_1 = 8, \, r = 2 \)

3. **Exercise 15:** \( a_1 = 1, \, r = \frac{1}{2} \)

4. **Exercise 16:** \( a_1 = 6, \, r = -\frac{1}{4} \)

5. **Exercise 17:** \( a_1 = 1, \, r = e \)

6. **Exercise 18:** \( a_1 = 2, \, r = \pi \)

7. **Exercise 19:** \( a_1 = 3, \, r = \sqrt{5} \)

8. **Exercise 20:** \( a_1 = 4, \, r = \frac{1}{\sqrt{2}} \)

9. **Exercise 21:** \( a_1 = 2, \, r = \frac{x}{4} \)

10. **Exercise 22:** \( a_1 = 5, \, r = 2x \)

---

### Writing the \( n \)-th Term of a Geometric Sequence

**Instructions:** In Exercises 23–28, write the first five terms of the geometric sequence. Determine the common ratio and write the \( n \)-th term of the sequence as a function of \( n \).

1. **Exercise 23:** \( a_1 = 64, \, a_{k+1} = \frac{1}{2} a_k \)

2. **Exercise 24:** \( a_1 = 81, \, a_{k+1} = \frac{1}{3} a_k \)

3. **Exercise 25:** \( a_1 = 9, \, a_{k+1} = 2a_k \)

4. **Exercise 26:** \( a_1 = 5, \, a_{k+1} = -2a_k \)

5. **Exercise 27:** \( a_1 = 6
Transcribed Image Text:**Geometric Sequences: Exercises and Solutions** ### Writing the Terms of a Geometric Sequence **Instructions:** In Exercises 13–22, write the first five terms of the geometric sequence. 1. **Exercise 13:** \( a_1 = 4, \, r = 3 \) 2. **Exercise 14:** \( a_1 = 8, \, r = 2 \) 3. **Exercise 15:** \( a_1 = 1, \, r = \frac{1}{2} \) 4. **Exercise 16:** \( a_1 = 6, \, r = -\frac{1}{4} \) 5. **Exercise 17:** \( a_1 = 1, \, r = e \) 6. **Exercise 18:** \( a_1 = 2, \, r = \pi \) 7. **Exercise 19:** \( a_1 = 3, \, r = \sqrt{5} \) 8. **Exercise 20:** \( a_1 = 4, \, r = \frac{1}{\sqrt{2}} \) 9. **Exercise 21:** \( a_1 = 2, \, r = \frac{x}{4} \) 10. **Exercise 22:** \( a_1 = 5, \, r = 2x \) --- ### Writing the \( n \)-th Term of a Geometric Sequence **Instructions:** In Exercises 23–28, write the first five terms of the geometric sequence. Determine the common ratio and write the \( n \)-th term of the sequence as a function of \( n \). 1. **Exercise 23:** \( a_1 = 64, \, a_{k+1} = \frac{1}{2} a_k \) 2. **Exercise 24:** \( a_1 = 81, \, a_{k+1} = \frac{1}{3} a_k \) 3. **Exercise 25:** \( a_1 = 9, \, a_{k+1} = 2a_k \) 4. **Exercise 26:** \( a_1 = 5, \, a_{k+1} = -2a_k \) 5. **Exercise 27:** \( a_1 = 6
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