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21 September, 12:26

What are the first two terms of the sequence defined recursively by the formula

an = (an-1) ^2+4 when a4=1604

A. 2, 8

B. 6, 40

C.

D.

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Answers (1)
  1. 21 September, 12:37
    0
    A3^2+4=1604

    a3=40

    a2^2+4=40

    a2=6

    a1^2+4=6

    a1=√2

    So the first two terms are √2 and 6, answer C
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