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30 December, 12:50

Find the first, fourth, and tenth terms of the arithmetic sequence described by the given rule. A (n) = - 6 + (n-1) (1/5)

A. 5, - 5 1/5, 1 4/5.

B. - 6, - 5 1/5, - 4

C. 0, 3/5, 1 4/5

D. - 6, - 5 2/5, - 4 1/5

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Answers (1)
  1. 30 December, 13:12
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    Answer is D. - 6, - 5 2/5, - 4 1/5

    A (1) = - 6 + (1-1) (1/5) = - 6 + 0 = - 6

    A (4) = - 6 + (4-1) (1/5) = - 6 + 3/5 = - 5 2/5

    A (10) = - 6 + (10-1) (1/5) = - 6 + 9/5 = - 4 1/5

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