Science:Math Exam Resources/Courses/MATH110/December 2016/Question 04 (c)
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Question 04 (c) 

Determine whether each one of the following functions is continuous at using the definition of continuity. You must fully justify your answer. (c) 
Make sure you understand the problem fully: What is the question asking you to do? Are there specific conditions or constraints that you should take note of? How will you know if your answer is correct from your work only? Can you rephrase the question in your own words in a way that makes sense to you? 
If you are stuck, check the hints below. Read the first one and consider it for a while. Does it give you a new idea on how to approach the problem? If so, try it! If after a while you are still stuck, go for the next hint. 
Hint 1 

Note that for the expression can be simplified. 
Hint 2 

Check the right hand limit carefully. 
Checking a solution serves two purposes: helping you if, after having used all the hints, you still are stuck on the problem; or if you have solved the problem and would like to check your work.

Solution 

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Please rate my easiness! It's quick and helps everyone guide their studies. Clearly is defined at and . The left hand limit is Since and the right hand limit is This means that does not exist. Therefore, fails to be continuous at . Answer: 