Question

If you explain to me simply, Medal + Fan + Super Testimonial will be given! :)

CALCULUS:

How do I find the Inflection point?
http://screencast.com/t/M74UKjB9B5

Answer 1

@agent0smith @robtobey @ganeshie8 @Mertsj

Answer 2

Inflection point is the second derivative equals to zero.

Answer 3

so how do I actually find the inflection point after I get the seecond derivative? More specifically , what's the inflection point in problem #16 and why?

Answer 4

Set the second derivative equal to zero and solve for x

Answer 5

what if the second derivative doesnt have an x and is f''(x)= -2

Answer 6

There isn't one

Answer 7

The concavity of that function doesn't change

Answer 8

yeah it has a degree of 2, then it is a parabola.

Answer 9

Then why do I get this as an answer: http://screencast.com/t/LNQ63ldvvus

Answer 10

For the function x^2 -3x + 8 that is wrong

Answer 11

This is for problem #16 not #15

Answer 12

The one that is not circled in red

Answer 13

That is also a degree two polynomial and has no inflection point

Answer 14

Then why is says this http://screencast.com/t/LNQ63ldvvus

Answer 15

It indeed says that it does no have an inflection point BUT, it continues and says: F has an inflection point at x = -1/2 whys that

Answer 16

lol nice offer :)

Answer 17

Enters AravindG to save the world once again! :P

Answer 18

if by F they mean the anti-derivative of f, then the inflection point of the anti derivative would be the first derivative of f, which would be

-2x -4 = 0
x = -2

Answer 19

@Christos I think Hunus has got hold over the question . I will just watch :)

Answer 20

I dont think integrals are on the game in this problem :/

Answer 21

@AravindG Oki doki :(

Answer 22

I believe that's what they're referring to when they stop using f and say the inflection point of 'F' is -1/2 because f has no inflection points

Answer 23

but the problem itself doesn't ask me to find the inflection point of the anti-derivative

Answer 24

I know. I'm not sure why that is part of their answer

Answer 25

@AravindG do you have something to say/add to this?

Answer 26

can I ADD TO THIS!

Answer 27

Yes of course

Answer 28

because I want medal + FAN + SUPER TESTOMONIAL LOL

Answer 29

okay! lets start with a graph!

Answer 30

ight

Answer 31

go ahead lets see what you got