Arithmetic Sequence Equations

What's the explicit equation?

• f(n) = 2 + 3(n-1)

• f(n) = n + 3

• f(n) = f(n-1) +3

• f(n) = f(n+3)

What are the next 3 terms in this sequence of terms? 3, 7, 11, 15

• 18, 22, 26

• 19, 21, 23

• 19, 23, 27

• 18, 21, 24

For each sequence, state if it is arithmetic, geometric, or neither.
−34, −26, −18, −10, −2, ... 

• Arithmetic

• Geometric

• Neither

Does the following table represent a geometric sequence or an arithmetic? Explain 

• geometric, it has a constant rate

• geometric, it has a constant percentage

• arithmetic, it has a constant rate

• arithmetic, it has a constant percentage

• Sequence

• Recursive Formula

• Explicit Formula for an Arithmetic Sequence

• Explicit Formula for a Geometric Sequence

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

What is the 15th term of the sequence an = -3n+50

• 95

• -5

• 5

• -95

Identify whether the following sequence is Arithmetic or Geometric and identify the common ratio or difference:
 -14, -11, -8, -5, ... 

• Arithmetic
  Common Difference: 3

• Arithmetic
  Common Difference: -3

• Geometric
  Common Ratio: 4

• Geometric 
  Common Ratio: 3

The first three terms of an arithmetic sequence are as follows.

3, -4, -11

Find the next two terms of this sequence

• -17 and -25

• -18 and -26

• -18 and -25

• -17 and -26

Is the sequence arithmetic?

17, 9, 1, -7, ...

• Yes

• No