Algebra-1

Question Analysis  
This question involves finding the common difference in an arithmetic sequence with decimal terms.  
The main focus is on applying the common difference formula to non-integer values.  

Key Concept Explanation  
The common difference is calculated the same way for decimal terms as for integers: . The presence of decimals does not change the definition.  

Step-by-Step Solution  
1. Take two consecutive terms, e.g., and .  
2. Calculate

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