Finding Intervals for Increasing and Decreasing Functions of a Cubic Equation

  • Thread starter Thread starter dallas429quee
  • Start date Start date
dallas429quee
Messages
1
Reaction score
0
hi, I'm not good at math at all. and I'm not sure how to finish this equation. any help would be appreciated. Thanks.



I need to find the intervals of where the function is increasing and decreasing.

f(x)= 2x3 - 5x2 - 4x + 2
 
Physics news on Phys.org
Well first you need to differentiate it. What do you think you should do after that?
 
You need first to construct a table for that and find the roots of the equation and its differentials.
 

Thread 'Finding the nth roots of a complex number'

There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
View full post »

Similar threads

Piecewise Function: Intervals of Increase/Decrease & Extremes/Asymptotes
Replies
11
Views
2K
Determine if a function is strictly increasing/decreasing
Replies
4
Views
2K
Finding where this function is increasing or decreasing
Replies
10
Views
2K
Increasing and decreasing functions
Replies
2
Views
2K
I have troubles finding the limit of this piecewise function
Replies
9
Views
2K
Intervals of Increase/Decrease
Replies
9
Views
2K
Intervals of increase and decrease
Replies
7
Views
3K
Intervals of increasing/decreasing Using Inequalities
Replies
9
Views
2K
Show there exists a smooth (bump) function....
Replies
11
Views
4K
Intervals of increase and decrease
Replies
5
Views
2K

Hot Threads

Recent Insights

Back
Top