If a, b, c are in AP, b - a, c - b and a are in GP, then a: b : c

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241.

If a, b, c are in AP, b - a, c - b and a are in GP, then a: b : c is

  • 1 : 2 : 3

  • 1 : 3 : 5

  • 2 : 3 : 4

  • 1 : 2 : 4


A.

1 : 2 : 3

Given that, 2b = a + cand   c - b2 = b - aa     b - a2 = b - aa                 b = 2a                c = 3a      a: b: c = 1 :2: 3


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