牛顿迭代法 Tangent line y=f(x)l (graph of linearization of f atxn) (xo f(xo)》 y=f(x) Point:(cn,fxn》 Slope:f(x) Equation: y-f(xn)=f(xn)(x-x) ,f) (xn f(xn)》 (2f0x2》 Root sought Root sought 日→x 0 3 0 0 Fourth Third Second First f(xn) APPROXIMATIONS ntl=n-f(xn 牛顿迭代法