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9 January, 06:33

What answer describes this sequence?

99, 89.9, 78.8, 68.7, ...

a) Neither arithmetic nor geometric

b) Both arithmetic and geometric

c) Arithmetic

d) Geometric

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Answers (2)
  1. 9 January, 06:39
    0
    A) Neither arithmetic nor geometric
  2. 9 January, 07:01
    0
    A) Neither arithmetic nor Geometric

    Explanation:

    Since 99-89.9 = 9.1, and 89.9 - 78.8 = 11.1, the sequence is not arithmetic.

    Like wise 89.9/99=0.908 and 78.8/89.9 = 0.876 makes it not a geomtric sequence
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