Using Newton's Method to Solve Transcendental Equations
Newton's method is most useful
when applied to complicated functions where we have no way to get an
algebraic solution, even with the help of a computer.
For instance, solving ex+x=4 is the
same as finding the roots of f(x)=ex+x−4.
As always, we have xn+1=xn−f(xn)f′(xn),