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Які з наведених нижче властивостей числових характеристик мають місце? 1) M(X+Y)...

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Які з наведених нижче властивостей числових характеристик мають місце?

1) M(X+Y) = M(X) + M(Y)

2) D(X-Y) = D(X) - D(Y)

3) M(C*X) = C*M(X), де С=const

4) D(C*X) = C*D(X), де С=const

5) M(X-M(X))^2 = M(X^2) - (M(X))^2

6) M(X-M(X)) = 0

7) D(C) = C, де С=const

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