Arithmetic and Geometric Sequences and Series Review

Find the sum of the finite arithmetic series

10 + 20 + 30 + ... + 120

• 840

• 620

• 780

• 1283

Find the first term in the arithmetic sequence where the 6th term is 56 and the 9th term is 92.

• -16

• 12

• -4

• 8

Evaluate the series.

• 36

• 85

• 35

• 86

Which of the following is the common difference of the arithmetic sequence 4, 7, 10, 13, …?

• 0

• 1

• 2

• 3

Write the recursive formula for 6, 17, 28, 39, 50....

• a_n=a_n-1+11
  a₁=6

• a_n=a_n-1-4
  a₁=6

• a_n=a_n-1+9
  a₁=6

• a_n=a_n-1+6
  a₁=6

Create the explicit formula for the sequence:
2, 8, 14, ...
(Hint:  Write your formula and then simplify it.)

• a_n=2+6n

• a_n=-6+6n

• a_n=6n-4

• a_n=4-6n

Find the specified partial sum of

Find the sum: 11 + 15 + 19 + .......+ 83

• 19

• 83

• 893

• 624

• 55

• 59

• 63

• 67

• 365

• 440

• 522

• 611