What is the ninth term of the arithmetic sequence defined by the rule A (n) = - 14 + (n-1) (2)

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Mathematics

Bradyn Houston

9 June, 21:31

What is the ninth term of the arithmetic sequence defined by the rule A (n) = - 14 + (n-1) (2)

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Axel Mays · Answer 1

If you start counting from 0, you ninth term will be 8. Replace n=8 and calculate:

A (8) = - 14 + (8-1) (2) = - 14 + (7) (2) = - 14 + 14 = 0

If you start counting from 1, your ninth term will be 9. Replace n=9 and calculate:

A (9) = - 14 + (9-1) (2) = - 14 + (8) (2) = - 14 + 16 = 2