Linear and Quadratic Approximations The linear and quadratic approximations of a function f at x = a are P 1 ( x ) = f ' ( a ) ( x − a ) + f ( a ) and P 2 ( x ) = 1 2 f " ( a ) ( x − a ) 2 + f ' ( a ) ( x − a ) + f ( a ) In Exercises 55-58, (a) find the specified linear and quadratic approximations of f , and (b) use a graphing utility to graph f and the approximations. f ( x ) = arctan x , a = 0
Linear and Quadratic Approximations The linear and quadratic approximations of a function f at x = a are P 1 ( x ) = f ' ( a ) ( x − a ) + f ( a ) and P 2 ( x ) = 1 2 f " ( a ) ( x − a ) 2 + f ' ( a ) ( x − a ) + f ( a ) In Exercises 55-58, (a) find the specified linear and quadratic approximations of f , and (b) use a graphing utility to graph f and the approximations. f ( x ) = arctan x , a = 0
Solution Summary: The author explains how to find the linear and quadratic approximations of f.
Linear and Quadratic Approximations The linear and quadratic approximations of a function f at
x
=
a
are
P
1
(
x
)
=
f
'
(
a
)
(
x
−
a
)
+
f
(
a
)
and
P
2
(
x
)
=
1
2
f
"
(
a
)
(
x
−
a
)
2
+
f
'
(
a
)
(
x
−
a
)
+
f
(
a
)
In Exercises 55-58, (a) find the specified linear and quadratic approximations of f, and (b) use a graphing utility to graph f and the approximations.
2. (5 points) Let f(x) =
=
-
-
- x² − 3x+7. Find the local minimum and maximum point(s)
of f(x), and write them in the form (a, b), specifying whether each point is a minimum
or maximum. Coordinates should be kept in fractions.
Additionally, provide in your answer if f(x) has an absolute minimum or maximum
over its entire domain with their corresponding values. Otherwise, state that there is no
absolute maximum or minimum. As a reminder, ∞ and -∞ are not considered absolute
maxima and minima respectively.
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