Use graphing utility to graph the function and determine the one side limits

Question

f(x)= 1/(x^2 -25)

lim(x---> 5-) f(x)

Answer 1

Step 1:

The function is .

Graph of the function :

 

Step 2: 

The limit of tends to , as x approaches 5 from left side.

Thus, .

 

Solution: