From the graph, in this function, . However, is not 2. It is the only value where x is very very close to 2, not actually 2. From the graph, it is easy to claim that the value where x is close to 2 is 1 (, , , ). So we can write this statement as And this statement also could write as Also, here is a important things that when you write something like , is not a function of x. We could replace x into whatever you want, like . The letter “x” is only a temporary label for some quantity that is (in this case) getting very close to 2.
From the graph, in this function, . However, is not 2. It is the only value where x is very very close to 2, not actually 2. From the graph, it is easy to claim that the value where x is close to 2 is 1 (). So we can write this statement as And this statement also could write as Also, here is a important things that when you write something like , is not a function of x. We could replace x into whatever you want, like . The letter “x” is only a temporary label for some quantity that is (in this case) getting very close to 2.