Science:Math Exam Resources/Courses/MATH105/April 2013/Question 01 (i)
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Question 01 (i) |
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Short-Answer Questions. Put your answer in the box provided but show your work also. Each question is worth 3 marks, but not all questions are of equal difficulty. Evaluate |
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 |
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Can you rewrite the given sum in such a way that it looks like the Taylor series of a particular well-known function evaluated at a particular point? |
Hint 2 |
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Remember the Taylor series for the exponential function: for all in the set of real numbers. |
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.
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Solution |
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Found a typo? Is this solution unclear? Let us know here.
Please rate my easiness! It's quick and helps everyone guide their studies. This question is challenging, but can be solved in an elegant way using a Taylor series. To begin with, rewrite the sum as: Next, set x = e-1 to obtain The last sum, however, is the Taylor series of the exponential function, Plugging x = e-1 back in we find that our final answer is |