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2017-05-15 14:17:30 +0200 | asked a question | Symbolic solution not fully solved? I'm not a mathematician, and only barely literate as a programmer, so please excuse me if I've overlooked something simple. I'm using sage to make plots to help in the design of heating elements. For the first iteration of my solution I could solve/check everything by hand but when trying to include load dependent voltage sag the equations became unwieldy and I want to use sage to symbolically solve the equations involved. For most of the equations I've entered, when I use "solve" on the symbolic expression it places the element that I wanted to solve for on the lhs of the equation, followed by an expression completely devoid of that term on the rhs. This is what I want. E.g.: yields: However for one equation it left a term that it "solved for" on the rhs. Does this mean that the equation can't be solved? Because these are physical, highly predictable systems I find that hard to believe, but I don't see another explanation? E.g.: yields: Which is a symbolic expression that still depends on the "solved for" variable?! Is this behavior a bug? Am I missing something? Is this equation simply lacking a solution? Thank you for your time |