# How do you find the 12th term of the arithmetic sequence 20, 14, 8, 2, -4, ...?

A term of an arithmetic sequence can be calculated with the formula:

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- How do you determine the first four terms of the sequence with #a_1 = 40# and #a_n = (1/2)a_(n-1)#?
- Is the sequence 1, -1, 1, -1 ... arithmetic, geometric, or neither?
- How do you find the first five terms of each sequence #a_1=12#, #a_(n+1)=a_n-3#?
- Is the following a geometric sequence 1.5, 2.25, 3.375, 5.0625,…?
- The basketball team scored 12 points the first game and 40 points the eighth game of the season. How many points will they earn with this pattern on the 13th game of the season?

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