Geometric Sequences
4 years ago
melcoffey
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15 QuestionsShow answers
  • Question 1
    60 seconds
    Q. Is the sequence 2, 4, 12, 48,... geometric?
    answer choices
    yes
    no
  • Question 2
    180 seconds
    Q. What is the common ratio for the sequence:
    28, 14, 7, 3.5...
    answer choices
    2
    1/2
    -14
    -7
  • Question 3
    120 seconds
    Q. Find the common ratio: 4, -16, 64, -256, ...
    answer choices
    r = -4
    r = 2
    r = -2
    r = 4
  • Question 4
    120 seconds
    Q. Find the common ratio: 64, -16, 4, -1, ...
    answer choices
    r = -8
    r = -1/4
    r = -4
    r = 4
  • Question 5
    180 seconds
    Q. Find the next three terms: 4, 12, 36, 108, ...
    answer choices
    324, 972, 2916
    972, 2916, 8748
    405, 1215, 3645
  • Question 6
    180 seconds
    Q. Find the next three terms: -4, -12, -36, -108, ...
    answer choices
    36, -108, 324
    -324, -972, -2916
    324, -972, 2916
    -108, 324, -972
  • Question 7
    900 seconds
    Q. Which formula is used to find the explicit equation for geometric sequences?
    answer choices
    an = an-1 + d
    an = an-1 * r
    an = a1 + d(n-1)
    an = a1 * rn-1
  • Question 8
    900 seconds
    Q. Which formula is used to find the recursive equation for geometric sequences?
    answer choices
    an = an-1 + d
    an = an-1 * r
    an = a1 + d(n-1)
    an = a1 * rn-1
  • Question 9
    900 seconds
    Q. What is the recursive rule for the sequence:
    11, 22, 44, 88...
    answer choices
    an = 2(11)n-1
    an = 11x 2
    an = 11(2)n-1
    an = 2an-1
  • Question 10
    120 seconds
    Q. Given the sequence:
    125, 25, 5, ....
    Write the explicit rule:
    answer choices
     t(n) = (125)(5)(n)
     t(n) = 625(1/5)(n)
     t(n) = 625(5)(n)
     t(n) = 125 + 5n
  • Question 11
    30 seconds
    Q. Find the general rule for: 64, -32, 16, -8, …  
    answer choices
    64(1/2)n-1
    (-32)n-1
    64(-1/2)n-1
    (32)n-1
  • Question 12
    180 seconds
    Q. Write an explicit rule for the general term of the sequence 5, 15, 45, . . . ?
    answer choices
    an = an-1 x 3
    an = 5(3)n-1
    an = 3(5)n-1
    an = 5 + (n-1)3
  • Question 13
    30 seconds
    Q. Find the 11th term for:  64, -32, 16, -8, …  
    answer choices
    -.0625
    .0625
    -.03125
    .03125
  • Question 14
    900 seconds
    Q. You have $10 in you bank account.  It doubles every month.  How much money will you have after 5 months?
    answer choices
    $50
    $35
    $320
    $250
  • Question 15
    30 seconds
    Q. Which sequence is represented by the equation 2(7)n-1 ?
    answer choices
    7, 14, 28, 56...
    2, 14, 98, 686...
    2, 9, 16, 23...
    7,9,11,13...
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