Task: Question Answering
Input (English): Question: f1(x)f1(x) = 2x - 1 and fn(x)=f1(fn−1(x))fn(x)=f1(fn−1(x)) for n ≥≥ 2. Find f5(2)

 Option A: 7

 Option B: 6

 Option C: 78

 Option D: 9

 Option E: 1
Output (English): Option A