Question 197794
<font face="Garamond" size="+2">


The domain of *[tex \LARGE f] where *[tex \LARGE f(x) = \sqrt{x^2-25}] is indeed ({{{-infinity}}},{{{-5}}}]*[tex \cup][{{{5}}},{{{infinity}}}).  So, unless "it", whatever "it" is, is bellyaching about your lack of a union symbol, then "it" is just plain wrong.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
</font>