Doubt from solution of traingle

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solution-of-triangle
find-summation
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#1


question 19

please use cauchy inequality i m getting wrong answer..

#2

Is it 107?

#3

yes sir how..

#4

But using general formulas, is it okay?

#5

#6

sir i know this method i want by cauchy sir.. hari shankar sir please help

#7

What @Shiva_1 did is just fine. There is no inequality involved here so Cauchy (or Titu's ) inequality cannot be used here.