Quadratic nth Term

python/calculators/quadratic nth term.py

@@ -0,0 +1,20 @@
+import operator
+
+def diff(a):
+	return list(map(operator.sub, a[1:], a[:-1]))
+
+sequence = [-0.5,1,4.5,10,17.5]
+row1 = diff(sequence)
+row2 = diff(row1)
+
+a = row2[0] / 2
+b = row1[0] - (3 * a)
+c = sequence[0] - a - b
+
+print('''
+a = {0}
+b = {1}
+c = {2}
+
+Equation: {0}n^2 + {1}n + {2}
+'''.format(a, b, c))

readme.md

@@ -36,3 +36,5 @@ Here you can find a bunch of random work from my GCSE Computer Science class dum
     - [12 - Evil](python/pythonchallenge.com/12%20-%20Evil.py)
     - [13 - Disproportional](python/pythonchallenge.com/13%20-%20Disproportional.py)
     - [14 - Italy](python/pythonchallenge.com/14%20-%20Italy.py)
+- [Calculators](python/calculators)
+    - [Quadratic nth Term](python/calculators/quadratic%20nth%20term.py)