Write a Formula for the General Term (The Nth Term) $$- 5 , - 10 , - 20 , - 40 , - 80 , \ldots$$

question 108

Multiple Choice

Write a formula for the general term (the nth term) of the geometric sequence.
- $$- 5 , - 10 , - 20 , - 40 , - 80 , \ldots$$

• A) \(a _ { n } = - 5 ( 2 ) ^ { n - 1 }\)
• B) \(a _ { n } = - 5 ( 2 ) ^ { n }\)
• C) \(a _ { n } = a _ { 1 } + 2 ^ { n }\)
• D) \(a _ { n } = - 5 ( 2 n )\)

---

Definitions:

Sample Statistic

A numerical measure that describes some characteristic of a sample, such as the sample mean or sample standard deviation.

50th Percentile

Also known as the median, it is the value below which 50% of the observations in a group of data fall.

N - 1

A formula used to calculate the sample variance or sample standard deviation, representing the sample size minus one.

Variance

A measure of the dispersion of a set of data points around their mean value, indicating how spread out the data are.