Thank you for helping! I think gneill must be right: the signs of voltage values (that are actually potential values, don't know whether it matters here) must tell us only the direction of the polarities. The introduction of this task is really long and it isn't in English so I thought it'd be...
We know that
- VM=VCl
- R1=1000.0 Ω
- IM=0
- VNa=61 mV
- VK=-88 mV
- VCl=-71 mV
Question is: what is R2?I've written according to Kirchhoff's second law that
(1) VM + VNa - R1INa = 0
and (2) VM - VK - R2IK = 0.
We can also calculate that ICl=0.
With these equations and according to Kirchhoff's...