\"\"

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The arithmetic sequence is \"\".

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Find the common difference by subtracting successive terms.

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\"\"

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The common difference is 3.

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Add 3 to last term of the sequence to get the next termin the sequence.

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Continue adding 3 untill the next three terms are found.

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13 + 3 = 16, 16 + 3 = 19 and 19 + 3 = 22.\"\"

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The next three terms are 16, 19, 22.