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VED1
          E\L-LOVELY-H\math21-1 IInd 21-10-11  IIIrd 24-1-12 IVth 21-4-12 Vth 20-8-12 VIth 10-9-12 VIIth 11-5-13


                                                                              bdkbZ     lkjf.kd % izdkj ,oa xq.k&/eZ




          igyh iafDr osQ lkis{k foLrkj djus ij                                                     uksV
                       1    .(x 2  − y 2 )  4  (x  −  yx  + ) (  ) y   4   5
                                                y
                     (x  + ) y             (x  + )
          mnkgj.k 6- fl¼ dhft;s fdµ
                                         1   x   y+ z
                                         1   y   z+ x    $
                                         1   z   x+ y

                                         1   x   x +  y +  z
          gy %                 lkjf.kd 4 1   y   x +  y +  z
                                         1   z   x +  y +  z
          
  dks 
 esa tksM+us ij

                                                  1   x   1
                                      4 (x +  y +  z ) 1  y  1
                                                  1   z   1
                                      4   3   3    8 /
                                      4/                          <∴   
  4 
    ∴  ∆   4 / =

          mnkgj.k 7- fl¼ dhft;s fdµ

                        1    1    1
                        a    b    c  4                   %
                       a 2   b 2  c 2

          gy % fn;k gqvk lkjf.kd
                                           1      0        0
                                      4 −  a      −  a    c  − b  a  ,  
 5 
  rFkk 
  5 
  ls





                                            2   b 2  − a  2  c 2  − a  a 2
                                          b −  a   c −  a
                                      4                   ,  	  osQ lkis{k foLrkj djus ij
                                         b −  2  a 2  c −  2  a 2

                                      4   5        5     5    5        5



                                      4           5    <   3    5    3   =
                                      4   5       5       5
                                      4   5       5       5
                                         	  osQ lkis{k foLrkj djus ij

          mnkgj.k 8- fl¼ dhft;s fdµ

                         1   a   a 2
                         1   b   b 2   4
                         1   c   c 2
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