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15 September, 14:11

the first term of an arithmetic sequence is 20 and the common difference is 15. Find the fifth term of the sequence

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  1. 15 September, 17:39
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    Solution

    The 1st term = 20

    Common difference (d) = 15

    5th term = a + d (n-1)

    = 20 + 15 (5 - 1) [Here n = 5)

    = 20 + 15 (4)

    5th term = 20 + 60 = 80

    The answer is 80.
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