1. $$\frac{{{{\text{f}}_{\text{n}}}}}{2}$$
  2. $$2{{\text{f}}_{\text{n}}}$$
  3. $$4{{\text{f}}_{\text{n}}}$$
  4. $$8{{\text{f}}_{\text{n}}}$$
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1 Answers

Answer: Option 1

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