Find the General Term of the Arithmetic Sequence Then Find $a _ { n }$

question 254

Multiple Choice

Find the general term of the arithmetic sequence then find the indicated term of the sequence. Assume that the domain of the sequence is all natural numbers.
-Find $a _ { n }$ and $a _ { 21 }$ .

• A) \(a _ { n } = n + 3 ; a _ { 21 } = 24\)
• B) \(a _ { n } = 4 - n ; a _ { 21 } = - 17\)
• C) \(a _ { n } = n - 4 ; a _ { 21 } = 17\)
• D) \(a _ { n } = n + 2 ; a _ { 21 } = 23\)

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