Sequences

Find the sequence 10, 20, 30, 40.........

• Multiply by 10
• Add 10  
• Multiply by 2

Find the sequence;  2, 4, 6, 8,...........

• add 2
• multiply by 2

Find the sequence; -2, 2, -2, 2, -2............

• Add -1
• multiply by -1

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, ...

What is the common ratio of the geometric sequence below?
5, 25, 125, 625...

• 25

• 20

• 5

• 4

What is the common ratio in this sequence?

96, 48, 24, 12, ...

• 1/2

• 2

• 12

• 24

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

Write a recursive formula for the following sequence:

16,8, 4, 2,...

• f(1)=16

  f(n)=2f(n-1)

• f(1)=16

  f(n)=0.5f(n-1)

• f(1)=16

  f(n)=f(n-1) + 0.5

• f(1)=16

  f(n)=f(n-1) - 8