Arithmetic Mean If three numbers are in arithmetic progression, then the middle term is called arithmetic mean of first and third term. Since the three numbers 2, 4, 6 are in arithmetic prog…

Sum of Arithmetic Series   Let us consider an arithmetic series, a + (a + d) + (a + 2d) + (a + 3d) + ……. + (l – 2d) + (l – d) + l Here, first term = a, common difference = d, last term (t …

Arithmetic Progression Sequence A sequence is a set of numbers written in a particular order. E.g.         1, 3, 5, 7, 9, … is a set of odd numbers.                 1, 4, 9, 16, … is a set…