For the inverting amplifier, derive the voltage gain. Use the procedure that was used for the non-inverting amplifier.
Take into account that for the differential gain $A_\rm D$ of the ideal OPV applies: $A_\rm D \rightarrow \infty$.
This also applies: $1/A_\rm D \rightarrow 0$ , but it doesn't always apply ${{C}\over{U_x \cdot A_\rm D}} \rightarrow 0$, for an unknown constant $C$ and a voltage $U_x$!

• What is looking for?
• Number of variables?
• Number of necessary equations?
• Establishing the known equations
• Derivation of the voltage gain
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  

Which type of amplifier (inverting or non-inverting amplifier) has the lower input resistance? Why?