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