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Question

Let space a subscript 1 comma a subscript 2 comma a subscript 3 midline horizontal ellipsis space space be space straight a space harmonic space progression space such space that space a subscript 1 equals 5 space space and space a subscript 20 equals 25 space space Value
space of space straight n space for space which space a subscript n space space is space maximum space is space

  1. 22
  2. 23
  3. 24
  4. 25

The correct answer is: 24


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