Science:Math Exam Resources/Courses/MATH100/December 2010/Question 01 (j)
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Question 01 (j) 

ShortAnswer Questions. Each question is worth 3 marks, but not all questions are of equal difficulty. Full marks will be given for correct answers placed in the box, but at most 1 mark will be given for incorrect answers. Unless otherwise stated, it is not necessary to simplify your answers in this question.
At 4 (or about x =4) 
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 hint below. Consider it for a while. Does it give you a new idea on how to approach the problem? If so, try it! 
Hint 

Recall that the general equation for a second degree Taylor polynomial at a is given by: 
Checking a solution serves two purposes: helping you if, after having used the hint, 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. To find the second degree Taylor polynomial, we use the equation We know that a =4 and that ƒ(x)=√x. We can easily compute the derivatives to get Plugging this all in to the Taylor equation, we get: 