Given : $\"\"$ term of the A.P = 3n + 2.

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Then, $\"\"$ term of the A.P = 3(n - 1) + 2.

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Let d be the common difference of A.P.

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Common difference $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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Therefore, the common difference of A.P is 3.