1. The problem statement, all variables and given/known data I just have some very simple questions to ask. I'm testing a basic 3 OP instrumentation amplifier I have to short V2 to ground and test V1 from -2V to 2V, in 0.25 increments. I then have to short V1 to ground and test V2 from -2 to 2V in 0.25 increments. the results i have for V1 are for example: 2 vout = ~12.2 1.75 vout = ~11.4 1.5 vout = ~ 10.8 1.25 vout = ~ 9.2 . . ... i then have this equation to find the gain: ∂vout/ ∂vin1 when i'm doing this equation, i'm not undestanding the ∂. do i add up all the results and then divide it by all the vin1's added up like: 12.2+11.4+10.8.../2+1.75+1.25... or will i just take one result like 11.4/1.75. i know this is stupid question, i just wanna know if i'm doing it right. either way i do it, i get like ~6. when i do both the tests, each gain is ~6. do both the gain of each of the buffer amplifier add up 6+6=12 and 12 is the overall gain for the INA?