Solution: The sequence is $1, 5, 9, 13, 17, 21, 25, 29, 33, 37$. The sum of an arithmetic sequence is given by $ S = \fracn2(2a + (n-1)d) $. Here, $ n = 10 $, $ a = 1 $, $ d = 4 $. - Abu Waleed Tea
Mar 01, 2026
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