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Topics - Wei Cui

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MAT244--Misc / How do we calculate the WB bonus mark?
« on: December 21, 2018, 01:36:12 PM »
Happy holidays everyone!

Can someone please tell me how do we calculate the WB bonus mark ?  Thanks in advance!  :)

MAT244--Lectures & Home Assignments / Different methods
« on: September 20, 2018, 04:31:45 PM »
I find that there are different methods to solve for one differential question, even different profs have different methods (I guess they are the same in essence). Let's say when we solve the problems on our test or quiz, can we use a method which may differ from the one in the sample solution? Is there any formal format we should follow or as long as we solve the question, then we are fine?

MAT244--Lectures & Home Assignments / The restriction of the variable $t$?
« on: September 13, 2018, 02:50:10 PM »

I have a question for the Example 4 on 10th edition textbook in page 37.

To satisfy the initial condition, $c$ should be $1$, thus the answer for the question is: $y=t^2+\frac{1}{t^2}$,  $t>0$. The textbook explains that the restriction of variable $t$ to the interval $0<t<\infty$ results from infinite discontinuity in the coefficient $p(t)$ at the origin, but how can we figure it out? How to determine the restriction of $t$?

Thanks in advance!

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