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`        Plz tell above answer quickly and post it as soon as possible.............................................................`
8 months ago

Arun
23013 Points
```							Since, first and (2n - 1)th terms are equal. Let first term be x and (2n - 1)th term be y. Whose middle term is tn.in A.P. tn = x+y/2 = a in G.P.tn = sqrt(xy) = b in H.P.tn = 2xy/(x+y) = c  hence b^2 = ac and a> b> cHere, equatity holds (ie, a = b = c) only if all terms are same.
```
8 months ago
Saurabh Koranglekar
3177 Points
```							Dear studentConsider AP d,a,dHere a = d;Consider GP d,b,dRegardsHere b= d;Consider HP d,c,dHere c= dTherefore option a is correct
```
8 months ago
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### Course Features

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### Course Features

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