Evaluate (3^(n+2) - 3^n) ÷ (3^(n+1) + 3^n) for any integer n.

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• A 1
• B 2
• C 3
• D 9

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Answer: B. 2

Numerator: 3^n(3² - 1) = 8 × 3^n. Denominator: 3^n(3 + 1) = 4 × 3^n.
So the value is 8 ÷ 4 = 2.

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