+71 1. Write a rule for the nth term of the arithmetic sequence with a1= -7 and the common difference of 5/2.
2. Find the sum of the first 10 terms of the arithmetic series. -5 + 0 + 5 + 10 +...
| a. | 350 | b. | 170 | c. | 175 | d. | 180 |
3. Find the sum of the first 22 terms of the arithmetic sequence, if the first term is –2 and the common difference is –5.
| a. | –1199 | b. | 545 | c. | –1177 | d. | –2398 |
4. Find the common difference of the arithmetic sequence.
0, 0.4, 0.8, 1.2, . . .
| a. | –0.3 | b. | 0.3 | c. | 0.4 | d. | –0.4 |
5. Tell whether the sequence is arithmetic. If it finds the common difference.
a. -5, -1, 3, 7, 11,...
b. -1, -1/3, 1/3, 1 , 5/3,...
6. Identify the sequence as arithmetic, geometric, or neither.
1, 1, 2, 3, 5, 8, 13, . . .
