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Maths Arithmetic Progressions CBSE Board 2026 Medium

If a, b and c are in A.P., then:

If , and are in A.P., then :
  1. (a), and are also in A.P.
  2. (b), and are also in A.P.
  3. (c), and are also in A.P.
  4. (d), and are also in A.P.

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