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Find the first three terms of the geometric sequence defined by: a1 = −2; an = 3an − 1
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Find the first three terms of the geometric sequence defined by: a1 = −2; an = 3an − 1

User Brian Var
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1 Answer

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The first three terms are ...
-2
3(-2) -1 = -7
3(-7) -1 = -22


_____
The "-1" in the recursion formula tells you this is NOT a "geometric" sequence. In a geometric sequence, the ratio of terms is a constant. Here, it is not.
User Blins
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