www.apcalculusbc.com. is called the derivative of at. we write: “the derivative of f with respect...
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![Page 2: Www.apcalculusbc.com. is called the derivative of at. We write: “The derivative of f with respect to x is …” There are many ways to write the derivative](https://reader037.vdocuments.pub/reader037/viewer/2022110400/56649da85503460f94a948c7/html5/thumbnails/2.jpg)
0
limh
f a h f a
h
is called the derivative of at .f a
We write: 0
limh
f x h f xf x
h
“The derivative of f with respect to x is …”
There are many ways to write the derivative of y f x
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f x “f prime x” or “the derivative of f with respect to x”
y “y prime”
dy
dx“dee why dee ecks” or “the derivative of y with
respect to x”
df
dx“dee eff dee ecks” or “the derivative of f with
respect to x”
df x
dx“dee dee ecks uv eff uv ecks” or “the derivative
of f of x”( of of )d dx f x
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dx does not mean d times x !
dy does not mean d times y !
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dy
dx does not mean !dy dx
(except when it is convenient to think of it as division.)
df
dxdoes not mean !df dx
(except when it is convenient to think of it as division.)
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(except when it is convenient to treat it that way.)
df x
dxdoes not mean times !
d
dx f x
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In the future, all will become clear.
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y f x
y f x
The derivative is the slope of the original function.
The derivative is defined at the end points of a function on a closed interval.
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2 3y x
2 2
0
3 3limh
x h xy
h
2 2 2
0
2limh
x xh h xy
h
2y x
0lim 2h
y x h
0
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A function is differentiable if it has a derivative everywhere in its domain. It must be continuous and smooth. Functions on closed intervals must have one-sided derivatives defined at the end points.
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