The problem says solve assuming VI = 0, +2.5V, and -2.5V. I know that if VI = -2.5V the MOSFET's are in cutoff and that VDS = 0. and IDP and IDN will = 0, but would V0 also = 0?
If VI = 0 the circuit is not in cutoff, and I'm assuming it is in triode region, but I'm not sure. I'm also assuming if VI = 2.5 the circuit is in saturation region, but again, not sure how to verify this without knowing V0 to start with.
Any help with this problem would be much appreciated.