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18 February, 21:48

Find the first six terms of the sequence.

a1 = - 7, an = 4 ' an-1

-7, - 28, - 112, - 448, - 1792, - 7168

-28, - 112, - 448, - 1792, - 7168, - 28,672

-7, - 28, - 24, - 20, - 16, - 12

0, 4, - 28, - 24, - 20, - 16

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Answers (1)
  1. 18 February, 23:31
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    A1 = - 7, an = 4 (an - 1)

    a2 = 4a1 = 4 (-7) = - 28

    a3 = 4a2 = 4 (-28) = - 112

    Therefore, the first six terms are - 28, - 112, - 448, - 1792, - 7168, - 28,672
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