Solving using Minerr function for two variables

[ppal]

Please see attached Prime 4  file that I am stuck with.

I am trying to solve for two unknows and plot one of them.  Plot n.

I have had  success with one varible which I have attached as pictures in the mathcad.

Thanks  for all the  assistance that I know will be forthcoming.

Regards

[RichardJ · Accepted solution]

See the attached worksheet.

[ppal]

Excellent!