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What is an explicit formula for an arithmetic sequence with a common difference of -2 and whose first term is one?

User Lejla
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1 Answer

4 votes

Answer:


a_(n) = - 2n +3

Explanation:

the explicit formula for an arithmetic sequence is


a_(n) = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

here a₁ = 1 and d = - 2 , then


a_(n) = 1 - 2(n - 1) = 1 - 2n + 2 = - 2n + 3

User Balron
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