Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Help (Attached below) Determine the extrema of below on the given interval
 8 months ago
 8 months ago
Help (Attached below) Determine the extrema of below on the given interval
 8 months ago
 8 months ago

This Question is Closed

mathcalculusBest ResponseYou've already chosen the best response.0
i know we have to find the derivative and set it to zero
 8 months ago

mathcalculusBest ResponseYou've already chosen the best response.0
i got x= 8 and x= 2/9
 8 months ago

mathcalculusBest ResponseYou've already chosen the best response.0
now to have the intervals, im a little lost on...
 8 months ago

mathcalculusBest ResponseYou've already chosen the best response.0
would there only be 2 intervals?
 8 months ago

mathcalculusBest ResponseYou've already chosen the best response.0
or 3? 02/9 then 2/98 and 8infinity?
 8 months ago

campbell_stBest ResponseYou've already chosen the best response.0
ok... so whats the derivative...?
 8 months ago

mathcalculusBest ResponseYou've already chosen the best response.0
then i set it to = 0
 8 months ago

campbell_stBest ResponseYou've already chosen the best response.0
ok... so what are the solutions...?
 8 months ago

campbell_stBest ResponseYou've already chosen the best response.0
yep... so on [0, 4] substitute x = 0, 2/9 and 4 into the original equation and find the corresponding values...
 8 months ago

mathcalculusBest ResponseYou've already chosen the best response.0
because the 2 critical numbers are 8 and 2/9
 8 months ago

campbell_stBest ResponseYou've already chosen the best response.0
well (a) is asking for the location of that min and max on the interval x = 0 to x = 4 and as x = 2/9 is a critical point...you don't know its nature
 8 months ago

mathcalculusBest ResponseYou've already chosen the best response.0
ooooooh, 8 would be the other one
 8 months ago

campbell_stBest ResponseYou've already chosen the best response.0
so the value x =0 is f(0) = 2 x = 2/9 f(2/9) = 3.76 x = 4 f(4) = ?
 8 months ago

mathcalculusBest ResponseYou've already chosen the best response.0
so the max is 3.76 and min is 334?
 8 months ago

campbell_stBest ResponseYou've already chosen the best response.0
so just test x = 9, x = 8 and x = 9... and see what happens... I think x = 2/9 remains the max
 8 months ago

campbell_stBest ResponseYou've already chosen the best response.0
its an add interval since x = 9 gives a very large negative number
 8 months 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.