\"\"

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The arithmetic sequence is 121, 118, 115, .......

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In the arithmetic sequence \"\", and

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common difference \"\".

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Apply nth term of an arithmetic sequence formula: \"\".

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\"\"        (Substitute \"\", \"\" and \"\")

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\"\"              (Subtract: \"\")

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\"\"                          (Multiply: \"\")

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\"\"                                    (Subtract: \"\")\"\"

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The indicated term of arithmetic sequence is \"\".