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 its input approaches a certain value. It is essential for understanding continuity and the behavior of functions at specific points. For example, the limit of f(x) as x approaches 3 indicates what value f(x) is approaching when x gets very close to 3, regardless of the actual value of f(3).
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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 crucial for determining whether a limit exists. If there is a jump, hole, or vertical asymptote in the graph at x = 3, the limit may not exist, indicating a discontinuity.
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Existence of Limits
The existence of a limit at a point requires that the left-hand limit and right-hand limit both approach the same value. If these two limits differ or if one of them does not exist, then the overall limit does not exist. Understanding this concept is vital for analyzing the graph of f(x) near x = 3 to determine the limit's existence.
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Cases Where Limits Do Not Exist