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Find the 25th term of the arithmetic sequence when a1 = -14 and d = -5

1 Answer

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Answer:

a25 = -134

Explanation:

For first term a1 and common difference d, the formula for the n-th term is ...

an = a1 + d(n -1)

You want to evaluate this for n=25, a1=-14, d=-5. Filling in the numbers and doing the arithmetic, you get ...

a25 = -14 -5(25 -1) = -14 -120

a25 = -134

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