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2 March, 10:18

Which of the following equations could be used to solve for the tenth term of the following sequence?

15, 13, 11, 9, ...

A (10) = 15 + 10 (-2)

A (10) = 15 + 9 (-2)

A (10) = 15 + 9 (2)

A (10) = 15 + 10 (2)

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  1. 2 March, 10:25
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    The formula would be : an = a1 + (n - 1) * d

    where n is the term u want to find, which is 10 ... a1 = first term = 15 ... d is common difference = - 2.

    A (10) = 15 + (10 - 1) * - 2 ...

    A (10) = 15 + 9 (-2) <===
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