How Do You Calculate a One-Sided Limit?

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To calculate a one-sided limit, focus on the behavior of the function as it approaches a specific point from one direction. In this case, as x approaches 3 from the right, the numerator approaches 3 while the denominator approaches a very small value, leading to the limit tending towards infinity. The reason for asking only for the limit from the right is to analyze the function's behavior in that specific direction, which can differ from the left-hand limit. Understanding these concepts is crucial for solving limits effectively. This approach highlights the importance of directionality in limit calculations.
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I'm having trouble with this question

Find the one sided limit, if it exists

http://i2.photobucket.com/albums/y15/seiferseph/Untitled-2.jpg

I haven't been able to simplify the top or bottom, if someone could get me started, thanks!
 
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As x approaches 3 from the right, the top approaches the constant 3 while the bottom becomes small without value. What happens if you divide 3 by increasingly small values?

Note: Can you explain why the question asks only for the limit from the right?
 

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