sequence pretest

Identify whether the following sequence is Arithmetic or Geometric and identify the common ratio or difference:

97, 86, 75, 64, ...

• Arithmetic

  Common Difference: 8

• Geometric

  Common Ratio: -11

• Arithmetic

  Common Difference: -11

• Geometric

  Common Ratio: -8

Is this an Arithmetic sequence? 5, 4.25, 3.5, 2.75

• Yes
• No

Is the sequence-4, -12, -36, -108,... geometric?

• yes
• no

Tags

CCSS.HSF.BF.A.2

What is the explicit rule for the sequence:

11, 22, 44, 88...

• a_n = 2(11)^n-1

• a_n = 11x2

• a_n = 11(2)^n-1

Tags

CCSS.HSF.LE.A.2

Is the sequence geometric or arithmetic?
3, 6, 9, 12...

• Arithmetic
• Geometric
• Neither

Tags

CCSS.HSF.BF.A.2

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

Tags

CCSS.HSF.BF.A.2

What is the common ratio for the sequence:
3, 15, 75...

• 12
• 1/5
• 5/1
• 4/5

Tags

CCSS.HSF.BF.A.2

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

Tags

CCSS.HSF.BF.A.2

Find the 4th term for the sequence defined by a₁=9; a_n=a_n-1+8

• 35
• 17
• 41
• 33

Tags

CCSS.HSF.BF.A.2

What does the formula S = A₁/(1-r) give you?

• The finite sum of an arithmetic series.
• The infinite sum of a geometric series.
• The partial sum of a geometric series.
• The infinite sum of an arithmetic series.