Posted by **Shay** on Wednesday, July 27, 2011 at 7:47pm.

How do you find the nth term in a sequence of numbers if the values are increasing then decreasing? Ex. 1: -2, 3: 10, 5: -18

- math -
**MathMate**, Sunday, July 31, 2011 at 11:06pm
There are probably more than one "correct" answer.

1: -2, 3: 10, 5: -18

I think of it as two separate series interleaved together, namely:

1, 3, 5, 7, 9....

and

-2, 10, -18, 26, -34, ....

Your teacher has the final word.

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