Algebra-1

Question Analysis
This question tests the student's ability to use the explicit formula for an arithmetic sequence with a negative common difference. The problem provides the first term () and the common difference (), and asks for the 7th term ().

Key Concept Explanation
The explicit formula for an arithmetic sequence is given by . This formula works even when the common difference is negative, indicating a decreasing sequence.

Step-by-step Solution
1. Identify the given values: ,

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