Algebra-1

Question Analysis
This question tests the student's ability to calculate the common difference in an arithmetic sequence. The common difference is found by subtracting the first term from the second term.

Key Concept Explanation
In an arithmetic sequence, the common difference is the constant difference between any two consecutive terms. It can be calculated using the formula .

Step-by-step Solution
1. Identify the first term .
2. Identify the second term

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