210  8

      , -
         -
 ,  ^,6.  ,    
     .

,        
,    ,     -
   10%  +10%7.  ,   21  
  ,     .  ,  
        :

[ -10  '/,] + [-9  i/^il + ... + [9  ^i] + [10 x i/,i] = 0.

 ,       
      .   , 
      6,06%:

{[(-10 - )2  i/2i] + (-9 - )2  l/2i] + ... + [(9 - )2  '/,] +
+[(10-0)2xl/2l]}l/2=6,06.

          -
 ,        , -
       , -
  , ,     
.

 8.9   ,    -
.         -
         
.      ,  , 
     . ,     
        -
,  4,76%8.

8.3.2       

    () . 8.10      
  .      (8.4),     -
.   ,     , -
  :

/-^==2%+1,2/-,.                                    (8.5)

        (/^),   -
      ().      -
 ,   ^,      2%.
  ,  ^,  1,2.

 () . 8.10        .
     :

/,=-!% +0,8//.                               (8.6)

       ,    an 
    1%. ,      |3/,
 0,8.