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OpenStudy (anonymous):
Which of the following is the formula for this geometric sequence? 1, -3, 9, -27,... Answer an = -1(3)n-1 an = 1(-3)n-1 an = 3(-1)n-1
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OpenStudy (anonymous):
Test it yourself.
OpenStudy (anonymous):
Plus in 1, 2, 3, 4 for each of those equations.
OpenStudy (anonymous):
Plug in: 1, 2, 3, 4, for each of those equations and you will get the correct answer somewhere.
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