SOLUTION: 13. Please help with this math problem https://answers.yahoo.com/question/index?qid=20210419165930AAlPHLZ

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Question 1179193: 13. Please help with this math problem
https://answers.yahoo.com/question/index?qid=20210419165930AAlPHLZ
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

11, 7, 3, -1,-5,...
7-11=-4
3-7=-4
common difference is -4
a%5B1%5D=11
your formula is:
a%5Bn%5D=11-4%28n-1%29