Graph the function f ( x ) = − x 4 + 2 x 3 + 4 x 2 − 2 on the interval ( − 5 , 5 ) using a graphing utility. Then approximate any local maximum and local minimum values rounded to two decimal places. Determine where the function is increasing and where it is decreasing.
Graph the function f ( x ) = − x 4 + 2 x 3 + 4 x 2 − 2 on the interval ( − 5 , 5 ) using a graphing utility. Then approximate any local maximum and local minimum values rounded to two decimal places. Determine where the function is increasing and where it is decreasing.
Solution Summary: The author explains how to determine the function f(x)=-x4+2 x 2 using graphing utility.
Graph the function
f
(
x
)
=
−
x
4
+
2
x
3
+
4
x
2
−
2
on the interval
(
−
5
,
5
)
using a graphing utility. Then approximate any local maximum and local minimum values rounded to two decimal places. Determine where the function is increasing and where it is decreasing.
Formula Formula A function f(x) attains a local maximum at x=a , if there exists a neighborhood (a−δ,a+δ) of a such that, f(x)<f(a), ∀ x∈(a−δ,a+δ),x≠a f(x)−f(a)<0, ∀ x∈(a−δ,a+δ),x≠a In such case, f(a) attains a local maximum value f(x) at x=a .
An airplane flies due west at an airspeed of 428 mph. The wind blows in the direction of 41° south of west
at 50 mph. What is the ground speed of the airplane? What is the bearing of the airplane?
A vector with magnitude 5 points in a direction 190 degrees counterclockwise from the positive x axis.
Write the vector in component form, and show your answers accurate to 3 decimal places.
||A||=23
45°
Find the EXACT components of the vector above using the angle shown.
Chapter 1 Solutions
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (4th Edition)
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