third.py

c29ad69c · irada chinnachat · 9c4e3b3f · c29ad69c
Commit c29ad69c authored May 24, 2018 by irada chinnachat
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--- a/diff.py
+++ b/diff.py
+def f(x):
+    return e**(-x)
+def third (f,x=a,h=0.001)
+    return (f(x+2*h)-2*f(x+h)+2*f(x-h)+(-f(x-2*h)))/(2*(h**3))