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Did i take this derivative of the vector right?

by mr_coffee
Tags: derivative, vector
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mr_coffee
#1
Oct13-05, 10:14 PM
P: 1,629
Hello everyone, i just want to check to see if this derivative of the vector is right, I can't access maple and i don't have a ti-89 so i can't check!
here it is:
http://show.imagehosting.us/show/798..._-1_798939.jpg
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Pengwuino
#2
Oct13-05, 10:20 PM
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P: 7,120
Check that domain section...
mr_coffee
#3
Oct13-05, 10:56 PM
P: 1,629
ahh should be r >0 right? is the derivative right too? thanks!

Pengwuino
#4
Oct13-05, 10:58 PM
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Did i take this derivative of the vector right?

No. Look what happens to the i vector when you have t=3
mr_coffee
#5
Oct13-05, 11:25 PM
P: 1,629
oh f word....
can i say, t < 0?
Pengwuino
#6
Oct13-05, 11:29 PM
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P: 7,120
Well, the thing is that it can go above 0... but how far?

Start looking at the equations and ask yourself where each one has a valid result. For example, the i component can be t=<2


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