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Refer to the op amp circuit shown below.
Let R1 = 140 k_, R2 = 10 k_, R3 = 10 k_, R4 = 20 k_, RL = 10 k_. Assume the op amp is ideal.Find the equation relating the output voltage vo(t) if the input voltage source isvI(t) = 1V cos(2∏103t).Sketch vo(t).
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