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Given this arithmetic sequence, find d. 3,_,_,15
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5 votes
Given this arithmetic sequence, find d. 3,_,_,15

User Thoran
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a_1=3 \\ a_4=15 \\ \\ d= (15-3)/(4-1)= (12)/(3)=4

The answer is d=4
User Chris Latta
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