Hello to all ,
I am pretty sure that the circuit diagram in the mentioded textbook (reproduced in post#1) contains a typing/drawing error, otherwise the related questions make not much sense (in particular, the last question).
For my opinion, both opamp input terminals must be swapped. In this case, negative feedback would dominate and we have linear operation (amplification with a nice factor).
Juss, it is a good exercise for you to find the gain value for interchanged opamp inputs.
I am pretty sure that the circuit diagram in the mentioded textbook (reproduced in post#1) contains a typing/drawing error, otherwise the related questions make not much sense (in particular, the last question).
For my opinion, both opamp input terminals must be swapped. In this case, negative feedback would dominate and we have linear operation (amplification with a nice factor).
Juss, it is a good exercise for you to find the gain value for interchanged opamp inputs.