hard · GMAT Quant
A software release versioning index v_n satisfies v_1 = 1, v_2 = 3, and v_n = v_n-1 + 2v_n-2 for all integers n ≥ 3.
What is the value of v_7?
- 43
- 85
- 171
- 21
- 64
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