Mathematical operations using Op-Amp.

Adder can be obtained by using an op-amp in
Which of the following is linear circuit?
An amplifier which multiplies each input by a factor and then adds all these values together called
Positive feedback is not used in Op-Amp mathematical operations because
The feedback resistance used in mathematical operations of Op-Amp is generally connected between
In which of the following are operational amplifiers (op-amps) used?
An inverting amplifier has Rf=2MΩ and R1=2KΩ. Its scale factor is
What is the level of the current through the amplifier input(s) to ground in an op-amp?
A summing amplifier can be used as
The maximum frequency at which an op-amp may operate depends on the ________.