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Question
Define an arithmetic progression.
Solution
An arithmetic progression is a sequence of terms such that the difference between any two consecutive terms of the sequence is always same.
Suppose we have a sequence `a_1,a_2,a_3,a_4,....`
So, if these terms are in A.P., then,
`a_2 - a_1 = d`
`a_1 - a_2 = d`
`a_4 - a_3 = d`
And so on…
Here, d is the common difference of the A.P.
Example: 1, 3, 5, 7, 9 … is an A.P. with common difference (d) as 2.
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