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`        If b is the harmonic mean between a and c, then prove that 1/b-a + 1/b-c = 1/a + 1/c`
4 months ago

Vikas TU
9814 Points
```							Dear student since b is H.M. of a and c so  2/b= 1/a +1/cso R.H.S. = 2/bin L.H.S. = ( 2b-a-c ) / (b^2 - (a+c)+ac )now put  b= 2ac /(a+c) and simplify ityou will get the same thing.Hence the given relation is proved.
```
4 months ago
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### Course Features

• 731 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions