SOLUTION: Identify the common difference OR common ratio, depending on whether the sequence below is arithmetic or geometric. Then use the appropriate formula to write a rule for the seque

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Question 940731: Identify the common difference OR common ratio, depending on whether the sequence
below is arithmetic or geometric. Then use the appropriate formula to write a rule for the
sequence. Finally, use the rule to find the tenth term in the sequence.
–15, –9, –3, 3, 9,…
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Identify the common difference OR common ratio, depending on whether the sequence
below is arithmetic or geometric. Then use the appropriate formula to write a rule for the
sequence. Finally, use the rule to find the tenth term in the sequence.
–15, –9, –3, 3, 9,…
-----
Arithmetic::
common difference = 6
a(n) = -15 + (n-1)6
----
a(10) = -15 + 9*6 = -15 + 54 = 39
------------------
Cheers,
Stan H.
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