Given the Partial Sum of an Arithmetic Sequence $2.1 + 2.7 + 3.3 + \cdots + 13.5$

question 9

Essay

Given the partial sum of an arithmetic sequence $2.1 + 2.7 + 3.3 + \cdots + 13.5$ . Find its sum.

---

Definitions:

Language Acquisition

The method through which humans gain the ability to notice, create, and utilize words for understanding and communication purposes.

Nativist

A perspective that emphasizes the innate, biological foundations of behavior and cognitive development, often in contrast to the emphasis on environmental influences.

Linguistic Relativity

Linguistic relativity is the hypothesis that the structure of a language affects its speakers' world view or cognition, suggesting that language and thought are interdependent.

Nativist

A theory or perspective that emphasizes the role of innate factors over experience or learning in the acquisition of abilities and characteristics.