, , .. .
: -[].
:
1 | 2 | |||
1 | 2 |
-[] | 1-[] | 2-[] | -[] | |
1 | 2 |
. 0: [-[]]=0.
:
[-[X]]=[]-[[]]=[]-[]=0 <
? , . .
:
.
V.
0.5 | 0.5 |
Ï
N
: D[X]=[X2]-2[]: .
:
D[X]=[(X-[X])2]=[X2-2X*[]+2[]]=[2]-[2X*[X]]+[2[X]]=
=[X2]-2[X][X]+2[X]=[X2]-2[X] <