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igomit [66]
3 years ago
5

Write an explicit formula for the sequence 3,-9,27,-81

Mathematics
1 answer:
Dominik [7]3 years ago
7 0
The initial value is 3. The common ratio is -9/3 = -3. The general formula is
.. an = a1*r^(n-1)

So, for your values, ...
.. an = 3*(-3)^(n -1)
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