Arithmetic Progressions


Arithmetic Progressions logoSubject: Mathematics    Exam: NTSE

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Important Points

Any three numbers in A.P. be taken as a - d, a, a + d and any four numbers in A.P. taken as a - 3d, a - d, a + d, a + 3d.
A series in which each term is same multiple of the preceding term is called geometric progression. or, A series in which the ratio of successive terms is constant is called G.P.
The constant ratio is called common ratio (r).
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