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α=-8

 

. 3.1 - ,

, BCD, ECF.

, B(-10, 0) C(-1, -1), M2 = (‑M1‑10)/9, , C(-1, -1) D(0, -10), M2 = ‑9M1 - 10,

 

 

, . . ECF, EC M2 = (-M1 -10)/ 9 M1 [-8, -1], CF M2 = -9M1 -10 M2 = -9M1 -10 [-8, -1] (, , M1 [-1, -2/9]).

= -1 ( . 3.2).

= -9 -10 = -1.

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(,q) = 6pq + 9(1 - q) + 8(1 - p)q + 2(1 - )(1 - q) = (6-9p)q + 7 + 2,

(,q) = 9pq + 7(1 - q) + 4(1 - p)q +10(1 - )(1 - q) = (8q - 3) - 6q +10.

( = 2/3),

( = 3/8).

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