Introduction to Arithmetic and Geometric Sequence

The first term in an arithmetic sequence is -8 and the common difference is 14.  What is the 28th term given the equation a_n = a₁ + d (n - 1)

• 378

• 1024

• -324

• 370

The graph of an arithmetic sequence is ​ ​ (a)   and the graph of a geometric sequence is ​ (b)   .

• linear

• exponential

To find the next term in an arithmetic sequence…

• add the common difference d

• multiply by the common ratio r

a3 =

• 14

• 2

• 3

• 8

This sequence represents a(n)....

• Arithmetic Sequence

• Geometric Sequence

• Neither

The first term in a geometric sequence is 160 and the common ratio is 1/2.  What is the 7th term given the equation a_n = a₁ (r)^n-1

• 5

• 2.5

• 10

• 1.25

To find the next term in a geometric sequence…

• add the common difference d

• multiply by the common ratio r multiply by the common ratio r

How is an arithmetic sequence found?

• By multiplying the same number to the previous term. 

• By adding the same number to the previous term.

Describe the relationship between the terms in the arithmetic sequence 
4, 8, 12, 16

• Subtracting 4 to the previous term

• Adding 4 to the previous term

• Multiplying by 2 to the previous term

• Dividing each term by 2

Describe the relationship between the terms in the arithmetic sequence 
15, 30, 45, 60

• Adding 15 to the previous term

• Subtracting 15 to the previous term 

• Multiplying each term by 3

• Dividing the previous term by 2