A community for students.
Here's the question you clicked on:
 0 viewing
SanjanaP
 11 months ago
Help with Increasing and Decreasing Derivatives Please!!
SanjanaP
 11 months ago
Help with Increasing and Decreasing Derivatives Please!!

This Question is Closed

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1what is the question exactly?

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1If f'>0, then f is increasing If f'<0, then f is decreasing

SanjanaP
 11 months ago
Best ResponseYou've already chosen the best response.0Oh...sorry I thought I had the attachment on

SanjanaP
 11 months ago
Best ResponseYou've already chosen the best response.0I neeed help with C and D

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1so are you having problems with the part highlighted in yellow?

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1ok then so you know that g' will tell us if g is decreasing or increasing right?

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1so find g' given that: \[g(x)=\int\limits_{0}^{x} f(t) dt \] don't look at the picture yet just tell what g' is

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1no i'm sorry that isn't correct ok let's look at this... I will rewrite it a little... \[g(x)=F(x)F(0)\] where F'=f Now differentiate to find g'

SanjanaP
 11 months ago
Best ResponseYou've already chosen the best response.0I'm sorry..so what is g'?

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1you have to differentiate g(x)=F(x)F(0) to find g' can you do that?

SanjanaP
 11 months ago
Best ResponseYou've already chosen the best response.0I'm not sure what differentiate means anymore?

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1I will help you out some more. derivative of g is g' derivative of F is f (this was given above when I said F'=f) derivative of a constant is 0 everything i said in this little post right here will need to be used

SanjanaP
 11 months ago
Best ResponseYou've already chosen the best response.0oh....so the derivative of F(x) is f(x). Is that what you mean?

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1That is what I said

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1so do you know F(0) is a constant?

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1I think you are thinking of f(0) not F(0) f is given not F

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1Anyways F(0) is a constant. Because F is a just a function of x any if you plug in a number for x then you will definitely receive a constant  example: Say F(x)=cos(x) well F(0) is definitely a constant because F(0) is 1 and 1 never changes (it is and will always remain 1)

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1So going back to \[g(x)=\int\limits_{0}^{x} f(t) dt \\ g(x)=F(x)F(0)\] can you differentiate g now?

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1what that means is you will have to differentiate both sides (not just one side)

SanjanaP
 11 months ago
Best ResponseYou've already chosen the best response.0Can you just tell me where it is increasing and concave up...so I'll try to figure it out?

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1Try to use what I said earlier... derivative of g is g' derivative of F' is f derivative of a constant is 0 you can do this

SanjanaP
 11 months ago
Best ResponseYou've already chosen the best response.0I would prefer the answer because I have to write the explanation anyway.

SanjanaP
 11 months ago
Best ResponseYou've already chosen the best response.0Okay...so you g(x)= F(x)F(0)

SanjanaP
 11 months ago
Best ResponseYou've already chosen the best response.0that means g'(x) = f(x)0?

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1I'm not going to give just the answer. Sorry. But right g'=f so that means the picture given is g'

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1and you know if g'>0, then g is increasing and you know if g'<0, then g is decreasing

myininaya
 11 months ago
Best ResponseYou've already chosen the best response.1where on the picture that is given is g' above the x axis (because that is where g is increasing) and when g' is below the xaxis that is where g is decreasing

SanjanaP
 11 months ago
Best ResponseYou've already chosen the best response.0what about concave up?

SanjanaP
 11 months ago
Best ResponseYou've already chosen the best response.0dw:1407794546041:dw
Ask your own question
Sign UpFind more explanations on OpenStudy
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.