Question

what is the condition for the exestence of the limit of function at a points? ​

Answer 1

In calculus, a function is continuous at x = a if - and only if - all three of the following conditions are met: The function is defined at x = a; that is, f(a) equals a real number. The limit of the function as x approaches a exists. The limit of the function as x approaches a is equal to the function value at x = a.