What is the 10th term of the sequence represented by an = -3n + (-1)n?
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Question

What is the 10th term of the sequence represented by an = -3n + (-1)n?
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hayhayz · Answer

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veronicamorgan2 · Answer

What is the 10th term of the sequence represented by an = -3n + (-1)n?
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vocaloid · Answer

post your question in the math section please http://openstudy.com/study#/groups/Mathematics

mathmale · Answer

Your expression, an = -3n + (-1)n, is ambiguous in two places.  If you take pains to present it properly, you might get faster and better responses from would-be helpers.

an:  Your intention was to mention "the nth term of an arithmetic sequence."  Please type that as a_1 ("a sub n"), or, if you want to be both clear and fancy, type it in the Equation Editor (below) as $$a _{n}$$

mathmale · Answer

Secondly, by "(-1)n," I think you meant $$(-1)^n$$which is "the nth power of -1."

mathmale · Answer

If you did mean " a_n = -3n + (-1)^n, then:
a_1=-3(1)+(-1)^1=-3-1=-4

Try figuring out a_2, a_3, etc.  Finally find a_10.