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Continue to Chat2.29 An inverting amplifier is accidentally connected with positive feedback as illustrated in Fig. P2.29. Assuming the op amp has a finite gain A, find an expression for the closed-loop gain, vO/vI. Show that if A = 1 + (R2/R1), the closed-loop gain becomes infinite, indicating instability. Real op-amp gain varies with input frequency so that instability is practically inevitable when positive feedback is used. https://electricalstudent.com/2-29-an-inverting-amplifier-is-accidentally-connected-with-positive-feedback-as-illustrated-in-fig-p2-29-assuming-the-op-amp-has-a-finite-gain-a-find-an-expression-for-the-closed-loop-gain-vo-vi/