Define
f(x) = {3, x = -1/n
{x+1, 0 <= x <= 1

Ok so there may have been a better way to type that but I am not sure what it is. It should read like "Define f(x) to be equal to 3 if x = -1/n or f(x) equals x+1 if 0 is less than or equal to x which is less than or equal to 1."

I need to know
-Is f continuous on [0,1]?
-Is f right continuous on [0,1]?
-Is f continuous?

Any help would be extremely appreciated. I need explanations or something so I can really understand where you get the answers. PLEASE HELP ME!!! and FAST!!!! THanks soooo much!!!!!