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8 April, 02:36

Which best describes the relationship between the successive terms in the sequence shown?9, - 1, - 11, - 21, ...

a. the common difference is - 10.

b. the common difference is 10.

c. the common ratio is - 9.

d. the common ratio is 9.2. a sequence is defined recursively using the formula f (n 1) = f (n) - 5. which sequence could be generated using this formula?

a. 1, - 5, 25, - 125, ...

b. 2, 10, 50, 250, ...

c. 3, - 2, - 7, - 12, ...

d. 4, 9, 14, 19, ...

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Answers (1)
  1. 8 April, 05:22
    0
    hello:

    the arithmetic sequence 9, - 1, - 11, - 21 has common difference:

    d = (-21) - (-11) = (-11) - (-1) = (-1) - (9) = - 10

    sequence is defined recursively using the formula f (n + 1) = f (n) - 5 (arith - seq)

    is : C) 3, - 2, - 7, - 12, ...

    because : (-12) - (-7) = (-7) - (-2) = (-2) - (3) = - 5 = d (common difference)
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