Re: Stupid Arithmetic Tricks
On Thu, Mar 28, 2002 at 12:31:56PM -0500, Branden Robinson wrote:
> On Wed, Mar 27, 2002 at 08:08:40PM -0600, David Starner wrote:
>
> Now, since you can probably mop the floor with me when it comes to diff
> eq's, I'll defer to yours as the greater mathematical talent. I thought
> I was pretty good at math until I hit that brick wall. I phear people
> who can look at one and "just know" which solution technique to apply.
>
I use the same method of adding/multiplying in my head. And don't be
*too* surprised that people can do that -- after all, the best way
to find the answer to an ODE is to *guess*. Since some people will
naturally guess better than others.. (as we all know guessing is not
random) some people can 'see' answers to complex problems without
thinking too hard.
I had a Dynamics exam sophomore year of college with an ODE on the
last problem of the exam; only one person in the class got it
correct. The professor was astounded. "You didn't even TRY
e^x?"
Nate
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