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The first and ninth terms of an arithmetic sequence are 2/3 and 4/9, respectively. What is the fifth term?

 Oct 22, 2020
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F = 2/3 - First term
4/9 =F + 8D
D = - 1 / 36 - Common difference

5th term = 2/3 + (- 1/36 * 4)
               = 5/9

 Oct 22, 2020

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