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Derive a symbolic expression (i.e., a formula containing symbols R1, R2, ..., etc., andarithmetic operators instead of numerical values) for the voltage gain of the amplifier

What im stuck at is the two nodes on each side of R4

I initially disregarded the node to the right of R4, which was wrong. since there is a virtual sc at the input of the op amp terminals what would i consider the node on the right of r4?

What im stuck at is the two nodes on each side of R4

I initially disregarded the node to the right of R4, which was wrong. since there is a virtual sc at the input of the op amp terminals what would i consider the node on the right of r4?

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