The circuit shown below is an adder a subtractor an invertin

The circuit shown below is an adder. a subtractor. an inverting amplifier. a noninverting amplifier. If the voltage at e_2 is zero for the circuit shown in Question 4, the circuit could function as an adder. a subtractor. an inverting amplifier. a noninverting amplifier.

1) Subtractor Amplifier is the answer for 4 Question

2)Inverting Amplifier is the Answer if e2 is made to Zero.