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1. Use the sequence to answer the questions. 2.5, 6, 9.5, 13, 16.5, 20,… (a) What is the common difference? (b) What is the recursive rule for the sequence? Please give me the certified answer.

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well for question a.) the answer is 3.5 we find this by taking 6-2.5=3.5 th rule is to add 3.5
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