, .
. , , .
. - , .. .
, , , .
- . - , .
, , , - , , , ..
- , , .
() . , , .
, . - , . . , .
( ) ( 1).
() , . - :
|
|
1) () ():
= 1 + 2 + + n | (10) |
= 1 + 2 3 | (11) |
2) :
= 1 2 n | (12) |
3) ( :
= 1 / 2 | (13) |
4) , :
= (1 + 2) / (3 4) | (14) |
() , . , . , () .
1.
, () .
2 -