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Find the 81st term of the arithmetic sequence: -10, -25, -40, ...

Answer :

Final answer:

To find the 81st term of an arithmetic sequence, use the formula nth term = first term + (n-1) * common difference.

Explanation:

An arithmetic sequence is a sequence in which the difference between consecutive terms is constant. In this case, the common difference is -15. To find the 81st term, we can use the formula:

nth term = first term + (n-1) * common difference

Plugging in the values, we get:

81st term = -10 + (81-1) * -15

81st term = -10 + 80 * -15

81st term = -10 - 1200

81st term = -1210

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