Determine the output resistance of differential amplifier with three op-amp. The op-amp used is 741c, with A=200000 and Ro. The output and difference of input voltages are 44 and 11.

Determine the output resistance of differential amplifier with three o

1.	Determine the output resistance of differential amplifier with three op-amp. The op-amp used is 741c, with A=200000 and Ro. The output and difference of input voltages are 44 and 11.
A.	5.5m‚âà√≠¬¨¬©
B.	3.5m‚âà√≠¬¨¬©
C.	2.4m‚âà√≠¬¨¬©
D.	1.5m‚âà√≠¬¨¬©
Answer» E.