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If a, b, c, d are in H.P., then the value of is
  • a)
    1
  • b)
    2
  • c)
    3
  • d)
    4
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
If a, b, c, d are in H.P., then the value ofisa)1b)2c)3d)4Correct answ...
Concept:
Arithmetic Progression: Sequence where the differences between every two consecutive terms are the same.
For example:- a, a +  d, a + 2d, ... are in AP.
Four terms that are in AP can be taken as
a - 3d, a - d, a + d, a + 3d
Harmonic mean (HM):  If a, b & c are in HP then,
1/a, 1/b, 1/c are in harmonic progression (AP). 
Calculation:
Given that, a, b, c, d are in H.P. then
 
Let these terms be (x - 3y), (x - y), (x + y), (x + 3y)
Hence,
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If a, b, c, d are in H.P., then the value ofisa)1b)2c)3d)4Correct answer is option 'C'. Can you explain this answer?
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