Explicit to Recursive

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

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)

Which of the following equations is recursive?

• f(n) = f(n-1) +4

• f(n) = 2n - 5

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

• 1

• 2

• 3

• 4

• 5

Which recursive formula best describes the sequence 2, -6, 18, - 54...

• a₁ = 2; a_{n =} -4 a_n-1

• a₁ = 2; a_{n =} -8 a_n-1

• a₁ = 2; a_{n =} 2 a_n-1

• a₁ = 2; a_{n =} -3 a_n-1

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

Which statement is true about this formula?

• It is an EXPLICIT formula. The first four terms are 5,7,9,11

• It is a RECURSIVE formula. The first four terms are 5,13,29,61

• It is an EXPLICIT formula. The first four terms are 13,15,17,19

• It is a RECURSIVE formula. The first four terms are 13,29,61,125

Find the first four terms of the sequence.

a_n= a_(n-1) - 18 where a₁=10

• 18, 8, -2, -12

• 28, 46, 64, 82

• -8, -26, -44, -60

• 10, -8, -26, -44

Find the first four terms of the sequence. a_n= 2a_(n-1) + n where a₁= 0

• 0, 0, 0, 0

• 0, 1, 4, 12

• 0, 1, 2, 4

• 0, 2, 4, 8

Select the explicit rule that represents the sequence.

• a(n) = 6 + 5(n - 1)

• a(n) = 4 + 6(n - 1)

• a(n) = 6 - 4(n - 1)