dichotomie.py

Created by numworks

Created on April 11, 2018

218 Bytes

La fonction solve(f,a,b,epsilon) recherche une solution de l’équation f(x)=0 entre a et b avec une précision de epsilon par dichotomie. Les images de a et b par f, f(a) et f(b), doivent être de signes différents.

from math import *
def solve(f,a,b,epsilon):
  if f(a)*f(b)>0:
    return None
  else:
    while (b-a)>=epsilon:
      c=(a+b)/2
      if f(b)*f(c)<=0:
        a=c
      else:
        b=c
    return c

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