The circuit in Figure P9.75 is a first-order low-pass active filter, (a) Show that the vol...

The circuit in Figure P9.75 is a first-order low-pass active filter, (a) Show that the voltage transfer function is given by

(b) What is the voltage gain at dc (ω = 0)? (c) At what frequency is the magnitude of the voltage gain a factor of  less that the dc value? (This is the ‒3 dB frequency.)