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In the circuit below, the opamp is ideal.

 



If the circuit is to show sustained oscillations, the respective values of $R_{1}$ and the corresponding frequency of oscillation are

  1. $29 R$ and $1 /(2 \pi \sqrt{6} R C)$
  2. $2 R$ and $1 /(2 \pi R C)$
  3. $29 R$ and $1 /(2 \pi R C)$
  4. $2 R$ and $1 /(2 \pi \sqrt{6} R C)$

 

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