Algebra-1

Question Analysis
This question tests the student's ability to identify and calculate the common ratio in a geometric sequence. The sequence provided has alternating signs, which is a key characteristic of a geometric sequence with a negative common ratio.

Key Concept Explanation
A geometric sequence is defined by a constant ratio between consecutive terms. The common ratio can be found by dividing any term by its preceding term.

Step-by-step Solution
1. Identify the first few terms of the sequence:
2. Calculate the ratio between the second and first term: