How do I calculate Vo? I used the nodal voltage method combined with KCL, but it is not working out for me. I have:
At non-inverting port: $$ (v-.4V)/4kohm=0 $$ At inverting port: $$ (v-0)/2kohm+(v-Vo)/35kohm=0 $$
I solve these equations and end with \$v=.4V\$ and \$Vo=.75V\$.
I make the assumptions that the voltage at the input node equals the voltage at the inverting node and that the entire bottom wire is ground. The bottom wire is a super node connected to the negative side of Vo, so the entire bottom wire should have a voltage of 0.