Mathematics has hema in it.
Progressions
There are three types of progressions.
Arithmetic progression
Geometric progression
Harmonic progression
Arithmetic Progression
The definition of an arithmetic progression is that
consecutive terms have the same difference.
The first term of an arithmetic progression is given by "a"
The common difference of arithmetic progression is given by "d"
The example of an arithmetic progression is
1, 3, 5, 7, 9
a for this arithmetic progression is 1
d for this arithmetic progression is 2.
The genereal form of an arithmetic progression is
a, a + d, a + 2d, a + 3d and so on.
The nth term of an arithmetic progression is given by a + (n - 1)d
The sum upto n terms of an arithmetic progression
is given by (n/2)(2a + (n -1)d)