Newton Raphson Method - University of Surrey
personal.maths.surrey.ac.uk › st › S0.3 Example Let us solve cosx = 2x to 5 decimal places. This is equivalent to solving f(x) = 0 where f(x) = cosx − 2x. [NB: make sure your calculator is in radian mode]. The recursion formula (1) becomes x n+1 = x n − (cosx n −2x n) (−sinx n −2) With an initial guess of x 0 = 0.5, we obtain: x 0 = 0.5 x 1 = 0.45063 x 2 = 0.45018 x 3 = 0.45018...
The Newton-Raphson Method
www.sosmath.com/calculus/diff/der07/der07.htmlThis technique of successive approximations of real zeros is called Newton's method, or the Newton-Raphson Method. Example. Let us find an approximation to to ten decimal places. Note that is an irrational number. Therefore the sequence of decimals which defines will not stop. Clearly is the only zero of f(x) = x 2 - 5 on the interval [1,3].
The Newton-Raphson Method
www.math.ubc.ca › ~anstee › math104the behaviour of the error in the Newton Method. For example, if jf00(x)=f0(x)j is not too large near r,andwestartwithanx 0 close enough to r,theNew-ton Method converges very fast to r. (Naturally, the theorem gives ot too large," \close enough," and \very fast" precise meanings.) The study of the behaviour of the Newton Method is part of a large and