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Question 01 (a) 

(a) Calculate . 
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 

Recall that the limit of a square root is the square root of the limit. 
Hint 2 

Multiply the fraction by . 
Hint 3 

Use the facts that and , etc. 
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 

Found a typo? Is this solution unclear? Let us know here.
Please rate my easiness! It's quick and helps everyone guide their studies. By Hint 2, we have By Hint 1, we just need to compute the limit of the above fraction: .
Now we distribute the limit into each term and use Hint 3: Answer: 