medium · GMAT Quant
An acoustic sensor records signal echo amplitude S_n at millisecond n ≥ 3 using the recurrence relation S_n = 2 S_n-1 + 3 S_n-2. If S_1 = 2 and S_2 = 5
What is the signal echo amplitude at millisecond 5?
- 142
- 47
- 128
- 136
- 158
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