error when calculating roots using newtons method (1 Viewer)

[Rahul]

when using this, how do you find the percentage of error?

thanks

 

[Grizzly]

Newtons method fails you mean ?

Discontinous, un-differeintable, x-value not close enough to root. ?

 

[ND]

Do you mean how far off it is? You can only do that when you've got the exact value. (unless they ask you to compare the accuracy of like 1 application with 3).

 

[freaking_out]

Originally posted by Rahul
when using this, how do you find the percentage of error?

thanks

i've only heard of those sorta questions for simpsons/trapezoidal rule, in where u find the exact value and approximation and then find the percentage error.

 

[Rahul]

hmm...ok so i didnt word my question well

ok, say you have one root, @.

using netwon's method, you estimate a root, #.

find the accuracy when compared to the actual root, @.

hope that makes some sense

 

[kimmeh]

they wont ask this in ext 1 will they ?

 

[Rahul]

Originally posted by freaking_out
i've only heard of those sorta questions for simpsons/trapezoidal rule, in where u find the exact value and approximation and then find the percentage error.

actually i think may have been it. :S

not sure...and cant find any questions on it either...

 

[ND]

Umm 1 - #/@, is that what you mean?

 

[Rahul]

something like that.... and then you multiply by 100 to find the percentage?

 

[ND]

Yeh.

 

[Rahul]

are you sure it is (1 - #/@)*100. i just asked my friend and he said it was just (#/@)*100...

it is for using trapeziodal rule, not newtons