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Question 3 (b)
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.
Whenever you see a variable exponent take the logarithm followed by the exponential. In this case .
Note that the exponential is a continuous function. Therefore, if exists, the following equality would hold:
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.
Whenever you see a variable exponent take the logarithm followed by the exponential. In this case . Then, we want to compute the limit
Notice that using L'Hopital it's possible to compute the limit
Therefore, since the exponential is a continuous function, we have that