For oscillation to begin A) gain must be less than one and ...

[fagboi]

For oscillation to begin
 
  A) gain must be less than one and then continue to decrease
  B) gain must be less than one
  C) gain must be slightly greater than one
  D) gain must be exactly unity

Question 2

A summing amplifier
 
  A) algebraically adds the difference between two inputs
  B) algebraically adds two inputs
  C) algebraically adds any number of inputs
  D) none of the above

[ryhom]

Answer to Question 1

C

Answer to Question 2

C

[fagboi]

Thanks for the timely response, appreciate it

[aliotak]

Wow, this really help