This is common in maths when you approach a number 0 in this case) from either side. Your results may be dramatically different, such as "what happens when you approach 0 for f(x) = 1/x"
This is common in maths when you approach a number 0 in this case) from either side. Your results may be dramatically different, such as "what happens when you approach 0 for f(x) = 1/x"