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Question

If three numbers a, b, and c are in an A.P, then which of the following is/are the arithmetic mean between a and c?


  1. a+c2

  2. b

  3. ac2

  4. ac2


Solution

The correct option is B

b


If three numbers a, b and c are in an A.P., then b is the arithmetic mean between a and b.

Since a, b, and c are in A.P, b - a = c - b i.e., b = c+a2.

Hence both option (b) and option (c) are correct.

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