# Halley's method Calculator

## Calculates the root of the equation f(x)=0 from the given function f(x) and its derivatives f’(x) and f’’(x) using Halley’s method. | ||

Halley's method

[1-4] /4 | Disp-Num |

- Purpose of use
- To check my work.
- Comment/Request
- I just keep getting an "n error" message which tells me nothing. And when I chance my initial condition (to one I don't need) the error goes away.

My f(x) = atan(x)

f'(x) = 1/((x^2)+1)

f''(x) = (-2*x)/ (((x^2)+1)^2)

and x_0 = 1.5.

The calculator just will not do it.

[1] 2019/11/30 01:19 Male / 30 years old level / High-school/ University/ Grad student / Not at All /

- Purpose of use
- To check answerd

[2] 2018/08/09 23:27 Male / Under 20 years old / High-school/ University/ Grad student / Useful /

- Purpose of use
- Pharmacokinetics Solving
- Comment/Request
- This is really cool and you are a genius!

[3] 2018/08/04 21:43 Male / Under 20 years old / High-school/ University/ Grad student / Very /

- Purpose of use
- to solve gauss lobatto points

[4] 2016/08/08 21:22 Male / 30 years old level / Self-employed people / Very /

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**The hyperlink to [Halley's method]**