diff --git a/Schenk_Brandenberger_S5_Aufg1.py b/Schenk_Brandenberger_S5_Aufg1.py
index 3288ab6..e72b855 100644
--- a/Schenk_Brandenberger_S5_Aufg1.py
+++ b/Schenk_Brandenberger_S5_Aufg1.py
@@ -12,11 +12,14 @@ def f_diff(x):
     return 2 * x * math.pow(math.pow(math.e, x), 2) - 3 * math.pow(x, -4)
 
 
-def newtonStep(x0, function, function_diff):
-    return x0 - (function(x0)) / (function_diff(x0))
+def newtonStep(xn, function, function_diff):
+    return xn - (function(xn)) / (function_diff(xn))
 
-def simpleNewtonStep(x0, function, function_diff_x0):
-    return x0 - ((function(x0)) / (function_diff_x0))
+def simpleNewtonStep(xn, function, function_diff_x0):
+    return xn - ((function(xn)) / (function_diff_x0))
+
+def secantStep(xn, xn_1, function):
+    return xn - (xn - xn_1)/(function(xn) - function(xn_1)) * f(xn)
 
 def newton(x0, iterations, function, function_diff):
     print("Newton Verfahren:")
@@ -24,14 +27,13 @@ def newton(x0, iterations, function, function_diff):
     x.append(x0)
     print("x" + str(0) + ":", str(x[0]))
     for i in range(iterations):
-        x.append(newtonStep(x0=x[i], function=function, function_diff=function_diff))
+        x.append(newtonStep(xn=x[i], function=function, function_diff=function_diff))
         print("x" + str(i + 1) + ":", str(x[i + 1]))
 
 
 
 
 
-
 if __name__ == '__main__':
     newton(x0=2, iterations=4, function=f, function_diff=f_diff)
     simpleNewton(x0=0.5, iterations=4, function=f, function_diff=f_diff)
\ No newline at end of file