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Geometric Sequences

13. Sequences, Series, and the Binomial Theorem / Geometric Sequences / 문제 2

문제 2

Consider the geometric sequence $5$ , $negative 15$ , $45$ , ... Identify the common ratio, $r$ .

A

$3$

B

$- \frac{1}{3}$

C

Undefined

D

$negative 3$