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29 May, 18:27

What is the 20th term of the sequence that begins - 3, 6, - 12, 24?

a) - 524,288

b) 524,288

c) 1,572,864

d) 3,145,728

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Answers (1)
  1. 29 May, 18:42
    0
    The factor is ((-1) ^n) * (3) * (2^n-1)

    where n represent the number of term so if u want the 20th term ... put n=20 in this equation and u get 524288 so the answer is b
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