Science:Math Exam Resources/Courses/MATH253/December 2012/Question 01 (a)
• Q1 (a) • Q1 (b) • Q1 (c) • Q2 (a) • Q2 (b) • Q3 (a) • Q3 (b) • Q4 (a) • Q4 (b) • Q4 (c) • Q5 (a) • Q5 (b) • Q6 (a) • Q6 (b) • Q7 (a) • Q7 (b) • Q7 (c) • Q8 (a) • Q8 (b) • Q8 (c) • Q8 (d) •
Question 01 (a) 

Put your answer in the box provided and show your work. No credit will be given for the answer without the correct accompanying work. 1. Find the value of the constant k such that is a solution of the heat equation . 
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 

Find and . 
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 

Found a typo? Is this solution unclear? Let us know here.
Please rate my easiness! It's quick and helps everyone guide their studies. To determine the constant k such that the equation holds, we take the appropriate partial derivatives of the solution : We then substitute the terms into the diffusion equation: Cancelling out the on both sides of the equation gives us the final answer: 