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MathematicsMathematics
19 March, 10:51

Find an explicit formula for the following sequence, an, which starts with a1=-8.

-8,-5,-2,1,4, ...

+5
Answers (2)
  1. 19 March, 13:34
    0
    Formula for an is 3n - 11

    Step-by-step explanation:

    Step 1: Equation for a (n) = a + (n - 1) d where a = - 8, d = common difference = a2 - a1 = - 5 - - 8 = 3

    ⇒ a (n) = - 8 + (n - 1) 3 = - 8 + 3n - 3 = 3n - 11
  2. 19 March, 14:13
    0
    Answer:it's is D
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