y = f (x) , ¢() = f ¢(x). , : .
, D
,
a(D ) D , D 0 (a(D ) 0 D 0). ,
D = ¢()D + a(D )D .
. , D . ¢()D ¢() = D ( D ) , D :
.
a(D )D D 0 D :
,
a(D )D = (D ). (1) :
D = ¢()D + (D ), D = D + (D ). D D . D 0 : D ~ D , D D = (D ) D .
: |
y = f (x) , ¢() = f ¢(x). , : . , D , a(D ) D , D 0 (a(D ) 0 D 0). , D = ¢()D + a(D )D . . , D . ¢()D ¢() = D ( D ) , D : . a(D )D D 0 D : , a(D )D = (D ). (1) : D = ¢()D + (D ), D = D + (D ). D D . D 0 : D ~ D , D D = (D ) D .
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