SOLUTION: if the common difference is -9 and the first term is 3x, the arithmetic sequence that can be formed is

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Question 1185482: if the common difference is -9 and the first term is 3x, the arithmetic sequence that can be formed is
Answer by math_helper(2461) About Me  (Show Source):
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if the common difference is -9 and the first term is 3x, the arithmetic sequence that can be formed is
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Based on the given information, the first term a%5B1%5D+=+3x+, then the 2nd term will be a%5B2%5D+=+3x-9+, the third will be a%5B3%5D=+3x-2%2A9+=+3x-18, etc.   



In general, you have +a%5Bn%5D+=+3x+-+9%28n-1%29+ for n=1,2,3,...