Problem Analysis: We are asked to find the limit of the function −(x+3)25 as x approaches −3. The function is a rational function, and we need to determine if the limit exists as x approaches −3.
Denominator Behavior: First, let's analyze the function as x approaches −3. The denominator (x+3)2 becomes 0 when x=−3, which would make the function undefined at x=−3. However, we are interested in the limit as x approaches −3, not the value of the function at x=−3.
Numerator Behavior: Since the denominator (x+3)2 is squared, it will always be positive for all x except at x=−3 where it is 0. As x approaches −3 from either side, the denominator approaches 0, but it does so in a positive manner because of the square.
Combining Numerator and Denominator: The numerator of the function is −5, which is a constant. As x approaches −3, the numerator remains unchanged.
Limit Evaluation: Combining the behavior of the numerator and the denominator, as x approaches −3, the denominator approaches 0 positively, and the numerator stays at −5. This means the function's value will approach negative infinity because a negative number divided by a positive number that is getting closer and closer to 0 will result in a value that becomes more and more negative.
Conclusion: Therefore, the limit of (x+3)2−5 as x approaches −3 does not exist because the function approaches negative infinity. The correct answer is (D) The limit doesn't exist.
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