The Gang of Five
Beyond the Mysterious Beyond => Caption This! => Land Before Time Captions => Topic started by: DiddyKT2 on February 20, 2018, 07:21:57 PM
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(https://i.postimg.cc/RZnzq3Jm/Petrie-is-confused.jpg)
Poor Petrie. Never seems to be able to make a decision on his own.
Petrie: Uuuuummmmmm, ... why me no can think with so many distractions!?
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He's trying to take the derivative of a function using the limit definition.
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He's trying to take the derivative of a function using the limit definition.
Oh no :lol I don't even fully remember how to do that since you never use it after you learn the shorter method. It's something like Lim as h->0 of [f(x+a) - f(x)]/h right?
To continue the math trend, this would also be his expression when first learning integration by parts.
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He's trying to take the derivative of a function using the limit definition.
Oh no :lol I don't even fully remember how to do that since you never use it after you learn the shorter method. It's something like Lim as h->0 of [f(x+a) - f(x)]/h right?
I had to take a lot of derivatives using the limit definition for my Calc 1 class. I even had to do it a few times after learning the shortcuts! I actually learned two different formulas for it. One of them I think is lim as h->0 [f(x+h)-f(x)]/h, and the other one was something like the one you said, but I’m not sure exactly what it was. I never got the hang of either of them :p :bang
To continue the math trend, this would also be his expression when first learning integration by parts.
Gee, that’s reassuring! I just started Calc 2, so I’ll probably be doing that soon.
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Ah ok. No your way makes more sense having f(x+h) instead of some arbitrary a in there. Remember (or at least I should remember :p ) that the definition of a derivative is the slope of the tangent line to a curve. The slope is the change in y ( f(x+h) - f(x) ) over the change in x ( x + h - x = h ). To get the slope of the tangent the change in x has to shrink smaller and smaller until it is infinitesimal which is why we take the limit.
Gee, that's reassuring! I just started Calc 2, so I'll probably be doing that soon.
More then likely. I "learned" it in my second calculus course. My prof. was pretty bad though and no other course required it until I finally learned it for good in Quantum Mechanics, so it only took me a few years :lol
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Caption:
Petrie's response to the previous comments...
"Me no understand anything you guys talking about!"
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^ Lol nice one :p
Shifting from math over to chemistry, this probably would also be him when he first learns how to balance a redox equation
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My reaction to everything that has been said here in a nutshell.
I only have experience in Algebra and Geometry so far.
I also have to question, how did all of you still remember the stuff you learned back in school? Unless it's something important, I'd expect you to forget everything by now. :p
Well...you could still remember a few things here and there.
-b +/- the square root of b^2 - 2ac divided by 2a? Let's see if my memory of the quadratic formula was right...
Well, almost. I searched and found out it was -4ac, not -2ac. Pretty good overall though. :)