309a1414d512159c7c8701f52e85972a8f1c529e

戒赌日记

戒赌日记

郭敦顒回答:

2A>A+B+C+D+E+F (1)
5.5B>A+B+C+D+E+F (2)
4.3C>A+B+C+D+E+F (3)
3.2D>A+B+C+D+E+F (4)
6.7 E>A+B+C+D+E+F (5)
5.5 F>A+B+C+D+E+F (6)

移项使右边均为0得

+A-B-C-D-E-F>0 (7)-A+
4.5B-C-D-E-F>0 (8) -A-B+
3.3C-D-E-F>0 (9)-A-B-C+
2.2D-E-F>0 (10)-A-B-C-D+
5.7E-F>0 (11)-A-B-C-D-E+
4.5F>0 (12)注意,左边均大于右边的0,做加法运算进行消元时,才能保证结果左边仍大于右边的0.这是解这题的关键.

(7+(8)得,
3.5B-2C-2D-2E-2F>0 (13)

(7+(9)得,- 2B+
2.3C-2D-2E-2F>0 (14)

(7+(10)得,0>-2B-2C+
1.2D-2E-2F (15)

2(13)+
3.5(14)得,
4.05 C-11D-11E-11F (16)

2(13)+
3.5(15)得,-11 C+0.2D-11E-11F (17)

(16)+55(17)得,-600.95C-616E-616F>0 (18)

(7+(11)得,0>-2B-2C-2D+
4.7E-2F (19)

(7+(12)得,0>-2B-2C-2D-2E+
3.5F (20)

2(13)+
3.5(19)得,-11C-11D+1
2.45E-11F (21)

2(13)+
3.5(20)得,-11 C-11D-11E+1
1.3F (22)

(21)+55(17)得,-616C-59
2.55 E-616F>0 (23)

(22)+55(17)得,-616C-616E-59
3.7F>0 (24)

-600.95C-616E-616F>0 (18)

(18)、(23)与(24)式已是3元不等式了.

之后的解题过程还很复杂,虽然尚未最后完成,但重要的是上面已为解这题提供了重要思路.因精力所限,故先回答到这里.

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