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哪位大神帮我解一个六元一次不等式,要解集,不要最简式,..2A>A+B+C+D+E+F5.5B>A+B+C+D+E+F4.3C>A+B+C+D+E+F3.2D>A+B+C...
哪位大神帮我解一个六元一次不等式,要解集,不要最简式,..
2A>A+B+C+D+E+F
5.5B>A+B+C+D+E+F
4.3C>A+B+C+D+E+F
3.2D>A+B+C+D+E+F
6.7>A+B+C+D+E+F
5.5>A+B+C+D+E+F
6.7E,5.5F sorry 打漏了,求出他们的比例就行 展开
2A>A+B+C+D+E+F
5.5B>A+B+C+D+E+F
4.3C>A+B+C+D+E+F
3.2D>A+B+C+D+E+F
6.7>A+B+C+D+E+F
5.5>A+B+C+D+E+F
6.7E,5.5F sorry 打漏了,求出他们的比例就行 展开
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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+12.45E-11F (21)
2(13)+3.5(20)得,-11 C-11D-11E+11.3F (22)
(21)+55(17)得,-616C-592.55 E-616F>0 (23)
(22)+55(17)得,-616C-616E-593.7F>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.
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+12.45E-11F (21)
2(13)+3.5(20)得,-11 C-11D-11E+11.3F (22)
(21)+55(17)得,-616C-592.55 E-616F>0 (23)
(22)+55(17)得,-616C-616E-593.7F>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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