Difference, from an Arithmetic Progression perspective means, the difference between any two successive terms, i.e, terms which come after one another in case of an Arithmetic Progression. The difference between two terms of an AP is always the same. Such difference can be positive, negative or zero.
Consider three Arithmetic Progressions and find the difference between them : -
a. 3,6,9,12,15,18
b. 18,15,12,9,6,3
c. 3,3,3,3,3,3,3,3
