diff --git a/rozniczkowanie/rozniczkowanie.py b/rozniczkowanie/rozniczkowanie.py
new file mode 100644
index 0000000..6a3d1af
--- /dev/null
+++ b/rozniczkowanie/rozniczkowanie.py
@@ -0,0 +1,33 @@
+
+#
+x = [0.1, 0.3, 0.5, 0.7, 0.9, 1.1, 1.3]
+y = [20, 22.222222, 8, 4.081633, 2.469136, 1.652893, 0.83665]
+
+# x = [0.6, 0.7, 0.8, 0.9, 1.0]
+# y = [-0.51083, -0.35667, -0.22314, -0.10536, 0.0]
+
+def oblicz(x):
+    result = []
+    for i in range(len(x) - 1):
+        arr = [round(y[i] - y[i - 1], 5) for i in range(len(y) - 1, 0, -1)]
+
+
+
+h = x[1] - x[0]
+
+d2f = []
+for i in range(len(df) -1, -0, -1):
+    d2f.append(round(df[i] - df[i-1], 5))
+
+d3f = []
+for i in range(len(d2f) -1, -0, -1):
+    d3f.append(round(d2f[i] - d2f[i-1], 5))
+
+print(d3f)
+
+
+
+
+
+
+f = 1/h
\ No newline at end of file