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+--- Thread: calculate lim in CAS with only real numbers (/thread-20839.html)
calculate lim in CAS with only real numbers - Lukas - 11-14-2023 12:55 PM
I wanted to calculate lim(sqrt(2-x),x,2) and expected the HP Prime to tell me that it doesn't exist, because while lim(sqrt(2-x),x,2,-1) exists lim(sqrt(2-x),x,2,1) does not exist.
I guess the HP Prime allows complex solutions and that's why it works out? If so, can I change the settings so that I get the behavior that I expected? How? (I unchecked Complex and Use i in the CAS settings, but that doesn't seem to have helped).
RE: calculate lim in CAS with only real numbers - parisse - 11-15-2023 06:54 AM
You can't, because the first step in limit is substitution because the CAS is designed to perform computations efficiently. There are other commands that can help you, like domain here.