#
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