A sequence satisfies the recurrence relation with . What is the general formula for ?

Answer and explanation

Correct answer: A.

Setting gives , so we have :
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The general term for is .
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  1. Step 1: Rewrite the recurrence in standard homogeneous form .
  2. Step 2: Define the sequence . This is a geometric progression with common ratio and initial term :
  3. Step 3: Substitute back to solve for :
Answer
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