SECANT METHOD
Secant method defines a line that pass through (Xn-1 , f(Xn-1)).
Similarly the other methods, we obtain next approximation with a mathematical formulation, check this out:
This formulation comes from central approximation of a function.
To carry out secant method we need two initial approximations, root could not be between this interval; for this reason this methods isn’t a bracketing method.
Here we have steps to apply secant method:
You should repeat those steps till you reach the tolerance expected each case.
Source:
ResponderEliminarhttp://www.wordiq.com/definition/Secant_method
http://eom.springer.de/s/s083650.htm
http://sujinjoshi.co.cc/wordpress/2010/04/15/roots-using-newton-raphson-and-secant-method/