Algebra-1

Question Analysis
This question focuses on identifying an arithmetic sequence with a negative common difference, resulting in a decreasing sequence that includes both positive and negative terms. The main task is to verify a constant difference between consecutive terms.

Key Concept Explanation
An arithmetic sequence with a negative common difference will decrease by the same amount each time, and it can transition from positive to negative terms while maintaining the constant difference.

Step-by-Step Solution
Calculate the differences between consecutive terms: