Newton's Method help

[notgnsatall]

Hi.., I have the answer from the book but I'm too stupid to figure out. Help me, please.

 

[Deleted member 4993]

Hi.., I have the answer from the book but I'm too stupid to figure out. Help me, please.
View attachment 20779

Do you the method of finding roots using Newton's method?

If not - please do a google search with the keywords "Newton's method of finding roots o polynomials".

Please show us what you have tried and exactly where you are stuck.

Please follow the rules of posting in this forum, as enunciated at:

https://www.freemathhelp.com/forum/threads/read-before-posting.109846/#post-486520​

Please share your work/thoughts about this problem.



You can solve the problem with simple algebra - but you have been retricted to Newton's method in this case.

 

[Steven G]

[math] 404 = 400 + \dfrac{8d^2}{3*400} - \dfrac{32d^4}{5*400^3}[/math]. Now solve this using Newton's Method

BTW I am assuming that [math]l= L[/math]. You really should have stated that or not use both [math]l\ and\ L[/math]