For some reason I'm having a heck of a time with Continuity. I'm self teaching myself calculus and have been doing very well except for continuity. The example and lessons in the book im using are just horrible. Below are some example problems I need help with. I think if I could see some actual examples worked out it would help as the book provided none!
Find Values of X, if any at which f is not continuous
f(x)=5x^4-3X+7 - would I use intermediate theorem on this one?
f(x)=X+2/X^2+4 - would I set the denominator to zero?
f(x)=3/x+x-1/x^2-1 - not a clue