()
x1, x2,..., xn, p1,p 2,, pn. ()
, () .
:.
1.
M(C) = C.
2.
M (CX) = CM (X).
3.
M(XY) = M(X)M(Y).
4.
M (XY) = M (X) M(Y).
5.
M (X - M (X))= 0.
.
.
D(X) :
D(X) = M[X - M (X) ]2.
.
, :
= ();
d(x)=m(x2)-(m(x))2.
1.
d(c) =0.
2. ,
d(cx)= C2d(x).
3.
d(x+y)=D(x)+d(y).
4.
d(x-y)=D(x)+d(Y).
. .
s
.
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