09172003, 06:43 PM  #2 (permalink) 
Baltimoron
Location: Beeeeeautiful Bel Air, MD

This is why I don't take collegelevel math.
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"Final thought: I just rented Michael Moore's Bowling for Columbine. Frankly, it was the worst sports movie I've ever seen." Peter Schmuck, The (Baltimore) Sun 
09172003, 06:45 PM  #3 (permalink) 
The GrandDaddy of them all!
Location: Austin, TX

kinda sux when u have to
EDIT : I Figured it out! seems that 4 is the slope, and all u gotta do is to put it into slope intercept form. i was thinking too hard! and the answer is 15 if anyone is wondering
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"Luck is what happens when preparation meets opportunity."  Darrel K Royal Last edited by The_Dude; 09172003 at 06:50 PM.. 
09182003, 05:37 AM  #4 (permalink) 
Insane
Location: The Internet

What you are doing is using the longform differentiation method to evaluate the derivative of f(x) when x=4.
Long story short: the derivative of a function gives you the slope at point (x,y) [plug x into the derivative f ' (x)] and plug x into f(x) to get "y". the pointslop form y=mx+b is useful, however, also consider: yy1 = m(xx1) + b in the future.
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rm f /bin/laden 
09182003, 08:20 PM  #5 (permalink) 
Upright

hrmm.. unless I misunderstood your post Sapper, there is a very miniscule flaw. Just wanted to point out that y=mx+b is considered slopeintercept form, and that the other equation you stated was pointslope form. I know it's nothing big, but just thought I'd clarify that incase anyone got confused. :)

09192003, 11:30 AM  #6 (permalink) 
Insane
Location: The Internet

So true ... it's been awhile since I've had to consider the names of functions. In fact, for the first time in ages, I actually had to remember the intermediate value function in relation to infinity. So fundamental that I "just knew" the application .. but could not remember the proper name.
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rm f /bin/laden 
09192003, 07:42 PM  #7 (permalink) 
Crazy
Location: Philly

As a double check, you might want to consider getting a Ti89 graphing calculator. Will differentiate, integrate, and take limits symbolically. Wont help you learn the stuff, but its great to be able to check your answer before you have to hand something in or on a test.

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