1. Find fourth terms of the sequence a, = - 4 a = 30, + 2 (a) - 28 (b) 10 (c) - 82 (d) 244 (e) - 56 2. Write a formula for the general term of the sequence 1, - 4, 5, - 16, . . . (a) (- 1)72 2 ( b ) ( - 1 ) " ( # ) 2 (c) ( - 1)2-17 (d) ( - 1)" (e) - 3. Find the sum of the series E ( - 1)*-1/2 K = 1 (a) 28 (b) - 10 (c) 82 (d) - 244 (e) 80 4. Find the sum of the series _(24-i2:) 1= 0 (a) 28 (b ) 64 (c) 82 (d) 36 (e) 80 5. Find the eighteenth term of the arithmetic sequence that has a first term of - 3 and a common difference of 5. (a) 28 (b) - 10 (c) 82 (d) - 44 (e) 72 6. Find the eighteenth term of the arithmetic sequence that has a third term of - 3 and a common difference of 5. (a) - 28 (b) - 13 (c) 82 (d) - 44 (e) 72 7. Find the eighteenth term of the arithmetic sequence that has a third term of 10 and a seventh term 20. (a) 50 ( b ) 47.5 (c) 55 (d) 37.5 (e) 68 110 8. Find the sum of the arithmetic series _ (0.5k + 4) K = 3 (a) 3483 (b) 3438.5 (c) 3526.5 (d) 3429 (e) 784.5