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

question 133

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.
- $$a _ { n } = a _ { n - 1 } + 5 , a _ { 1 } = 18$$

• A) \(a _ { n } = 5 n + 13 , a _ { 20 } = 113\)
• B) \(a _ { n } = 18 n - 13 , a _ { 20 } = 347\)
• C) \(a _ { n } = 5 n + 23 , a _ { 20 } = 123\)
• D) \(a _ { n } = 13 n + 5 , a _ { 20 } = 265\)

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Definitions:

Telepaths

Individuals who are believed or claimed to be able to communicate with others through telepathy, the direct transmission of thought from one mind to another.

Research Psychologists

Professionals who study cognitive, emotional, and social processes by observing, interpreting, and recording how individuals relate to one another and their environments.

ESP

Extra-sensory perception, the claimed ability to obtain information without the use of known sensory mechanisms.

Telepathy

The claimed transfer of data between individuals without employing recognized human sensory methods or direct physical contact.