symbolic evaluation

[SFares]

Hello,

please see attached sheet. i have a bunch of questions. they are in red txt. in some i am trying to find the reson for getting the error, and others if there is a better way to do things. Thanks!

[RichardJ · Accepted solution]

See the attached.

[SFares]

Thank you Richard!

[Werner_E]

So I am late but for whatever its worth here is my answer

[SFares]

Thank you Werner for great explanation!