Q.Solution:

 

Text Box: A
Text Box: C
Text Box: B
 

 

 

 

 

 


Here, AD+BD >AB     ------(i)

and  CD+BD>BC        ------(ii)

from (i) and (ii)

      ð  AC+2BD  > AB+BC

ð 2(AC+BD)> AB+BC+CA

ð AC+BD     >