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So I did the first part, and got the gain as 11.

I also did part c, and got approximately 80khz,

but I'm not sure what to do for b).

I know that at the 3db frequency, the voltage is at 1/2

^{0.5}of it's amplitude.

So can I just use the equation f=(slew rate)/(2pi*A), and set A to 1V/2

^{0.5}, and solve for f? In which case f=112.5khz

If not, what should I do?

Thanks!