Chapter 3

True/False

1. True
   
2. False
3. False
4. True
5. False
6. False
7. True
8. True
9. False
10. False
    

Multiple Choice

1. c
   
2. d
   
3. d
4. b
5. b
6. c
7. d
8. b
9. a
10. d
    

Discussion

1. "By hand" values may differ slightly from Python output (shown in parenthesis).
   
1. 7.4 (7.4000000000000004)
2. 5
3. 8
4. illegal because sqrt cannot handle negative arguments
5. 11 
6. 27L
2. Answers may vary as long as the expressions are equivalent.
1. (3 + 4) * 5
2. (n * (n-1)) / 2
3. 4 * math.pi * r**2
4. math.sqrt(r * math.cos(a)**2 + r * math.sin(a)**2)
5. (y2 - y1) / (x2 - x1)
3. These can be checked interactively.
1. [0, 1, 2, 3, 4]
2. [3, 4, 5, 6, 7, 8, 9]
3. [4, 7, 10]
4. [15, 13, 11, 9, 7]
5. []
4. These can be checked interactively.

1. 0
   1
   4
   9
   16
   25
   36
   49
   64
   81
   100

2. 1 : 1
   3 : 27
   5 : 125
   7 : 343
   9 : 729
   9
   

3. 0 12
   2 12
   4 12
   6 12
   8 12
   done
   

4. 1
   2
   3
   4
   5
   6
   7
   8
   9
   10
   385
   

Programming Exercises