Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
rnotchick
Group Title
Find any critical numbers of the function f(x)=x^2(x^2−64).
 one year ago
 one year ago
rnotchick Group Title
Find any critical numbers of the function f(x)=x^2(x^2−64).
 one year ago
 one year ago

This Question is Closed

myininaya Group TitleBest ResponseYou've already chosen the best response.0
Find f' Set f'=0
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
Solve f'=0 for x :)
 one year ago

rnotchick Group TitleBest ResponseYou've already chosen the best response.0
Dont you have to set the derivative equal to 0?
 one year ago

rnotchick Group TitleBest ResponseYou've already chosen the best response.0
I am confused on what the derivative is of this
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
You know product rule you have a function times another function. You have x^2 times (x^264)
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
\[(fg)'=f'g+fg' \]
 one year ago

rnotchick Group TitleBest ResponseYou've already chosen the best response.0
okay thats what i thought
 one year ago

rnotchick Group TitleBest ResponseYou've already chosen the best response.0
Then the two numbers that make that 0 are 0 and 8 i thought
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
You need to find [x^2(x^264)]'
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
You need to use the product rule.... Or! You could distribute x^2 first then just use power rule for both terms.
 one year ago

rnotchick Group TitleBest ResponseYou've already chosen the best response.0
Okay after I have the derivative of that, what is the next step
 one year ago

rnotchick Group TitleBest ResponseYou've already chosen the best response.0
2x(x^264)+x^2(2x)
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
Right! :) Now set that equal to 0 and solve for x.
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.