Arithmetic & Geometric Sequences

Which sequence is an arithmetic sequence?

• 3,6,2,7, ...

• 3, 6, 12, 24, ...

• 3, 6, 10, 15, ...

• 3, 7, 11, 15, ...

Which sequence is a geometric sequence with a common ratio of 2?

• 5, 3, 1, -1, ...

• 5, 7, 9, 11, ...

• 5, 10, 20, 40, ...

• 5, 15, 45, 135, ...

Which equation describes the sequence in recursive form?

11, 8, 5, 2, . . .

Which equation describes the geometric function in explicit form?

5, 25, 125, 625, ...

The common ratio for the sequence 96, 48, 24, 12, . . . is

• 2

• 3

• 8

• -3

The first term in an arithmetic sequence is -8 and the common difference is 14.  What is the 28th term?

• 378

• 1024

• -324

• 370

The first term in a geometric sequence is 160 and the common ratio is 1/2.  What is the 7th term?

• 5

• 10

• 2.5

• 1.25

A theater has 32 rows of seats. If there are 26 seats in the 1st row, 30 in the 2nd, 34 in the 3rd, and so on, how many seats are there in 30th row?

• 258 seats

• 266 seats

• 4176 seats

• 250 seats

The stock's price of a company is not doing well lately. Suppose the stock's price is 92% of its previous price each day. What is the stock's price after 10 days if the stock was worth $2500 right before it started to go down?  

• $1850.33

• $2509.20

• $1085.97

• $1180.40