# Math Help - Newtons Method Help??

1. ## Newtons Method Help??

write down an equation g(x) such that its root g(x) = 0 occurs when x = 7^(1/3). Differentiate it to obtain g’(x). I dont understand how to do this....

it also says while e < 10^(–5)

Any thoughts?

2. ## Re: Newtons Method Help??

You are misreading the question. It certainly does NOT say "the equation g(x)" because "g(x)" is not an equation. Also you cannot mean that g(x)= 0 is a solution of an equation because the solution of an equation is a number, not another equation.

You mean that $x= 7^{1/3}$ is a root of the equation g(x)= 0. Take the third power of each side: $x^3= 7$ and then $g(x)= x^3- 7= 0$. Can you differentiate that?

3. ## Re: Newtons Method Help??

Shoot.... i didnt even think about that. That was a dumb move lol what does the epislom stuff mean???

4. ## Re: Newtons Method Help??

and yes i can