Here are the essential concepts you must grasp in order to answer the question correctly.
Limits
A limit describes the behavior of a function as the input approaches a certain value. It is essential for understanding continuity and the behavior of functions near points of interest. For example, the limit of f(x) as x approaches 2 indicates what value f(x) is approaching as x gets closer to 2, which can be crucial for determining the function's behavior at that point.
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Continuity
A function is continuous at a point if the limit as x approaches that point equals the function's value at that point. This concept is vital for determining whether a limit exists. If there is a jump, hole, or asymptote at the point in question, the function may not be continuous, leading to a limit that does not exist.
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Existence of Limits
The existence of a limit requires that the left-hand limit and right-hand limit at a point are equal. If these two limits differ or if one of them does not exist, then the overall limit does not exist. Understanding this concept is crucial for analyzing the graph of f and determining the limit as x approaches 2.
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Cases Where Limits Do Not Exist