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Arithmetic Progression

ARITHMETIC PROGRESSION
A sequence is called an arithmetic progression (abbreviated A.P.) if and only if the difference of any term from its preceding term is constant.
A sequence in which the common difference between successors and predecessors will be constant. i.e. a, a+d,a+2d
This constant is usually denoted by ‘d’ and is called common difference.
NOTE : The common difference ‘d’ can be positive, negative or zero.
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