Sequences

Is this sequence Arithmetic, Geometric, or Neither?

2, 9, 7, 14, 12, 19, ...

• Arithmetic

• Geometric

• Neither

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, ...

What is the common difference of the arithmetic sequence below?
-6, -1, 4, 9...

• 5

• -5

• -6

• 1/5

The next term of the series 11,8,5,2 is...

• -1

• -2

• 1

• 2

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 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

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

• linear
• exponential

• 100

• 105

• 110

• 115

• 12, 19, 26, 33, 40

• 12, 19, 25, 33, 40

• 13, 19, 26, 33, 40

• 13, 19, 25, 33, 40

Write the explicit formula for the sequence.

15, 22, 29, 36, 43, ...