To sketch: The graph of a function and discover the asymptotes.
The vertical asymptote of the function is .
Use an online graphing calculator to draw the graph of as shown below in Figure 1.
From the above graph, it is observed that is the vertical asymptote to the function .
Recall from the definition that is vertical asymptote if or .
Consider the function, .
Take limit on the above expression
Thus, the vertical asymptote to the function is .
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