INTEGRATION, MAXIMA & MINIMA HELP ! (1 Viewer)

[~> KAReN.]

hey pplz,

ive got a maths test on wednesday and i am literally dying...
im trying to study but im soOooOo lazy. however, i have studied for simpson's rule for the approximation methods and im getting every alternative question correct.

could someone explain simpson's rule? ~ ive read 2 textbooks and im still getting every alternative question incorrect...im pissed off and frustrated, since eveyone else can do it and i can't.

btw...same with maxima and minima ...

thanx* =]

 

[withoutaface]

http://www.boredofstudies.org/community/showthread.php?p=931586&highlight=simpsons#post931586

Maxima and minima work like this:
Differentiate the equation twice.
Find values of x for which f'(x)=0.
Substitute these values into f''(x). If the result is greater than zero it is a minimum, if it is less than zero it is a maximum, if it is equal to zero it is a stationary point of inflection.

 

[asdf]

If its equal to zero it tells you nothing!

 

[Xayma]

Exactly if it is equal to 0 you test points either side to get the concavity eg ±x⁴+c has f''(x)=0 at x=0 however whether it is a maximum or minimum changes on if it is plus or minus.