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20 February, 04:20

The first two terms of an arithmetic sequence are a1 = 2 and a2 = 4. What is a10, the tenth term? A. 19 B. 10 C. 18 D. 20

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Answers (2)
  1. 20 February, 04:32
    0
    Finde the difference between each one:

    d = A2 - a1 = 4-2 = 2

    sequence formula:

    an = a1 + (n-1) * d

    a10 = 2 + (10-1) * 2

    a10 = 2+9 * 2

    a10 = 2+18

    a10 = 20

    The answer is D.
  2. 20 February, 04:36
    0
    Since the difference between a1-a2 is 2, just multiply it 2x10 which is D
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