The formula for any arithmetic sequence is an = a1 + d (n - 1), where an represents the value of the n th term, a1 represents the value of the first term, d represents the common difference, and n represents the term number. What is the formula for the sequence 10, 8, 6, 4, ... ?
an = 10 + (-2) (n - 1)
an = 10 + 2 (n - 1)
an = - 2 + 10 (n - 1)
an = 2 + 10 (n - 1)
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