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tmagloire1
 one year ago
ap calc ab help please !
http://prntscr.com/8o63v0
http://prntscr.com/8o640n
tmagloire1
 one year ago
ap calc ab help please ! http://prntscr.com/8o63v0 http://prntscr.com/8o640n

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0f' is the line of the slope of f

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So on your first problem if you can find which line is positive when one is increasing and negative while the other is decreasing it's f'

tmagloire1
 one year ago
Best ResponseYou've already chosen the best response.0How can I find that without an equation?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You can look at how line A decreases on the interval infinity to zero

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and then you can see that line b is negative from infinity to zero

tmagloire1
 one year ago
Best ResponseYou've already chosen the best response.0This problem is so confusing omg. Okay so is line B decreasing from .4 infinit?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yeah something like that

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Really you just eyeball where one is negative and see if the other line is decreasing, and if the other is positive one is increasing

tmagloire1
 one year ago
Best ResponseYou've already chosen the best response.0I think line B is positive and increasing while line A is decreasing

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1444085317486:dw you can see that the straight line is the derivative because where its positive the arch is increasing and where its negative its decreasing

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I'd just tell you the answer but I think its kinda important to understand. Give me a sec

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay so I marked where line B is increasing / decreasing

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You can see that line b is negative while a is decreasing

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0as well as positive while a is increasing

tmagloire1
 one year ago
Best ResponseYou've already chosen the best response.0Yep so that would mean that it's f normal right

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0since the derivative is the line of the slope we know b is the derivative

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Do you get it? A is decreasing so the slope is negative, the slope of the line is the derivative. Look for the line that is negative while decreasing

tmagloire1
 one year ago
Best ResponseYou've already chosen the best response.0Oh ok so you just find where it's decreasing and negative and if the slope is negative than it's the derivative

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yeah but it doesnt have to be decreasing AND negative, just decreasing.

tmagloire1
 one year ago
Best ResponseYou've already chosen the best response.0oh ok i understand thanks for going through the work to help me with that one

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Your next problem is about the definition of a derivative at a point which is defined by this http://archives.math.utk.edu/visual.calculus/2/definition.8/eq1.gif

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Basically the number you want to find (the point) is a. So since you're finding 2, a is equal to 2.

tmagloire1
 one year ago
Best ResponseYou've already chosen the best response.0So i would just try plugging them into the two definition of limit equations and see what comes out?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Not really your thing would look like (f(2+h)  f(2))/h

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So for f(2+h) you plug (2+h) wherever you see x and f(2) where ever you see h for the 2nd part.

tmagloire1
 one year ago
Best ResponseYou've already chosen the best response.0wait what 2nd part are you referring to

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Do you understand how to plug everything in?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You dont need to actually do it for this problem, but thats important because sometimes you do. Its kinda situational

tmagloire1
 one year ago
Best ResponseYou've already chosen the best response.0im not sure i understand how to plug them in

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So I have (f(2+h)  f(2))/h My equation is x^2 + 3x + 1 f(2+h) would be (2+h)^2 + 3(2+h) + 1 f(2) would be 2^2 + 3(2) + 1 I now have ((2+h)^2 + 3(2+h) + 1  2^2 + 3(2) + 1)/h

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0actually more like ((2+h)^2 + 3(2+h) + 1  (2)^2 + 3(2) + 1)/h

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So then you just do algebra and simplify to get answers

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0But you can tell this one is c because c has x > 2 as the limit instead of h > 0

tmagloire1
 one year ago
Best ResponseYou've already chosen the best response.0oh ok so you take ((2+h)^2 + 3(2+h) + 1  (2)^2 + 3(2) + 1)/h and simplify to see if i get the other answers

tmagloire1
 one year ago
Best ResponseYou've already chosen the best response.0@swagmaster47 how can you tell the other answers are correct or not
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