The summing amplifier in Figure P14.15 has an op-amp with open-loop parameters: (A_{O L}=2 times 10^{3}, R_{i}=infty),

Question:

The summing amplifier in Figure P14.15 has an op-amp with open-loop parameters: $A_{O L}=2 \times 10^{3}, R_{i}=\infty$, and $R_{o}=0$. Determine the actual output voltage as a function of $v_{I 1}$ and $v_{I 2}$. What is the percent error from the ideal value?

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