Recursive Explicit Sequences

On a scale of 1-5, 1 meaning "I have no clue what is going on" to 5 meaning "I got it completely," how would you rate your understanding of recursive & explicit sequences

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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

A formula that requires the computation of all previous terms to find the value of a_n.

• Explicit Formula

• Recursive Formula

• Arithmetic Formula

• Geometric Formula

Write a recursive formula for the following sequence: 10, 5, 0, -5,...

• a₁= 10

  a_n= a_n-1 - 5

• a₁= 10

  a_n= a_n-1 + 5

• a₁= 10

  a_n= a_n (5)

• a₁= 10

  a_n= a_n-1 (5)

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A sequence is defined recursively by the function below. What are the terms of the sequence?​ a_3=​ a_8=​

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• 0.0625

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• 0.5

• 0.25

• 0.125

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• 0.0625

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• 0.5

• 0.25

• 0.125

Which statement is true about this formula?

• It is an EXPLICIT formula. The first four terms are -1,2,7,14

• It is a RECURSIVE formula. The first four terms are -2,2,0,-2

• It is an EXPLICIT formula. The first four terms are -1,-3,7,47

• It is a RECURSIVE formula. The first four terms are -2,-6,-18,-36

What is the common ratio for the sequence:
28, 14, 7, 3.5...

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• 1/2

• -14

• -7

What is the recursive rule for the sequence:
11, 22, 44, 88...

• a_n = 2(11)^n-1

• a_n = 11x 2

• a_n = 11(2)^n-1

• a_n = 2a_n-1