Question

When does a limit not exist?

Answer 1

the limit does not exist when left hand limit does not equal to right hand limit., do u know how to find these limits ?

Answer 2

Well kind of but can you can me an example?

Answer 3

yes,
find limit x-> 0 of x/2
when x is 0-, x/2 is negative.
when x is 0+, x/2 is positive.
hence that limit does not exist.