In the circuit shown below, let
R1=1000;R2=2000;R3=6000;R4=500;R5=5000;R6=3000;R7=1500;vs=1;
syms vn vp vo va
[vn,vp,vo,va]=solve((0-va)/R7+(0-vo)/R6,...
(vn-vo)/R5+vn/R4,...
(vp-vs)/R1+vp/R3+(vp-va)/R2,vp==vn,...
vn,vp,vo,va)
vn=vpa(vn,7)
vp=vpa(vp,7)
va=vpa(va,7)
vo=vpa(vo,7)
Answers:
vn =
0.2264151
vp =
0.2264151
va =
-1.245283
vo =
2.490566
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