Find $a _ { 1 }$ And and R for a Geometric Sequence

question 76

Multiple Choice

Find $a _ { 1 }$ and and r for a geometric sequence { $\left\{ a _ { n } \right\}$ } from the given information.
- $a _ { 2 } = 18$ and $a _ { 7 } = 4,374$

• A) \(a _ { 1 } = 18\) and \(r = 3\)
• B) \(a _ { 1 } = 6\) and \(r = 3\)
• C) \(a _ { 1 } = 6\) and \(r = 12\)
• D) \(a _ { 1 } = 18\) and \(r = 12\)

---

Definitions:

Laboratory Tests

Diagnostic tests carried out in a controlled environment to analyze bodily fluids or tissues for the purpose of identifying diseases or disorders.

Everyday Memory Capacity

Refers to an individual's ability to remember and process information related to daily activities and tasks.

Middle-Aged Adults

Individuals typically aged between 45 and 65, often experiencing significant life transitions and reflections.

Flynn Effect

The observed rise in standardized intelligence test scores over the 20th century, suggesting improvements in abstract thinking and problem-solving skills.