Can anyone figure out the input impedance of the circuit I have attached?(adsbygoogle = window.adsbygoogle || []).push({});

Does anyone know a THOROUGH definition of input impedance? output impedance?

Output impedance is equivalent to the thevenin impedance, which mean we turn off all voltage/current sources. But for input impedance, what if the circuit has voltage/current sources, what do we do (like the circuit I have attached)?

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# Input Impedance of SIMPLE Circuit

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