How to solve this ODE in SMath?

How to solve this ODE in SMath? - Messages

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#1 Posted: 4/27/2024 2:15:52 PM

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Lens.sm (362 KiB) downloaded 260 time(s).

#2 Posted: 4/27/2024 8:49:01 PM

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Looks like the algebraic relationships need to be separated out:

Lens_stv.sm (363 KiB) downloaded 260 time(s).

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Valery Ochkov 4/28/2024 12:04:00 AM

#3 Posted: 4/28/2024 3:18:10 AM

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Thanks!
New question.
Can we use here the Mathcad-block for ODE solution?
See please the attach
Lens.sm (118 KiB) downloaded 257 time(s).

#4 Posted: 5/1/2024 2:07:58 PM

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The solution at N>30 and with units
Lens-Euler-RungeKutta.sm (59 KiB) downloaded 256 time(s).