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Newton-Raphson method - Matlab

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Hi,

Part (1/2)
I need help/advice in solving non-linear equations using
Matlab. My focus is on the

- Bisection method
- Regula falsi
- Muller's method (if possible)

I have seen programs for the above methods on the
internet, but I could not see *examples* how to use
these programs. So, if you wish to point me to a
site or two, I need practical examples.

Also, I need to know how to find complex roots using
the Newton-Raphson method.

Part (2/2)
I also need help to use Matlab to solve simultaneous equations using the Gauss-Jordan elimination method
(with normalization)

thanks

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