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23 December, 20:31

The first term of a sequence is 4 and the common ratio is - 2. What is the formula for the sequence based on term number

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  1. 23 December, 20:35
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    its B and the next one is C
  2. 23 December, 21:01
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    for sequence

    an=4x (-2) n-1

    for the 20th term

    a20=-2,097,152
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