What is the condition for a function f(x)f(x)f(x) to be continuous at x=ax = ax=a?
limxtoaf(x)\\lim_{x \\to a} f(x)limxtoaf(x) exists
f(a)f(a)f(a) is defined
limxtoaf(x)=f(a)\\lim_{x \\to a} f(x) = f(a)limxtoaf(x)=f(a)
Both a and b