Write a Formula for the General Term (The Nth Term) $$\mathbf { a } _ { \mathbf { n } }$$

question 218

Multiple Choice

Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for $$\mathbf { a } _ { \mathbf { n } }$$ to find $$a _ { 20 }$$ , the 20th term of the sequence.
- $$\mathrm { a } _ { 1 } = 8 , \mathrm {~d} = 0.6$$

• A) \(\mathrm { a } _ { \mathrm { n } } = 0.6 \mathrm { n } + 7.4 ; \mathrm { a } _ { 20 } = 19.4\)
• B) \(a _ { n } = 0.6 n + 8 ; a _ { 20 } = 20\)
• C) \(a _ { n } = 8 n - 7.4 ; a _ { 20 } = 152.6\)
• D) \(a _ { n } = 8 n + 0.6 ; a _ { 20 } = 160.6\)

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