Question 1040094:  The 3rd term of an arithmetic sequence is 12 and its 7th term is 32, what is its 11th term? 
 Answer by Boreal(15235)      (Show Source): 
You can  put this solution on YOUR website! For an arithmetic sequence, each distance is equal. 
From the third term to the seventh is 4 terms and it increased 20. Therefore the common difference is 4. 
For the 11th term, four terms above 7, the value will be 20 more than 32, or 52. 
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