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謝謝！
更新1:
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數學題…正變~
2010-12-30 5:13 am
解釋+答案+式
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謝謝！
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謝謝！
回答 (2)
2010-12-30 5:28 am
✔ 最佳答案
(a) Let E = C + kN ( k is non-zero )( 7500 x 4/3 ) = C + 300k ====> 300k + C = 10000 ----- (1)
( 12000 x 4/3 ) = C + 500k ====> 500k + C = 16000 ----- (2)
(2) - (1): 200k = 6000 k = 30
By (1): C = 16000 - 300( 30 ) = 1000
E = 1000 + 30N
============
(b) E = 4750 x 4 = 19000
19000 = 1000 + 30N
30N = 18000
N = 600
Hence, there are 600 participants
===========================
Hope I have helped you.
參考: Mathematics Teacher Mr. Ip
2010-12-30 5:24 am
E = C + pN, p 係常數
(3/4)(C + 300p) = 7500
C + 300p = 10000
(3/4)(C + 500p) = 12000
C + 500p = 16000
200p = 6000
p = 30
C = 10000 - 300(30) = 1000
E = 1000 + 30N
---------------------------
(1/4)(1000 + 30N) = 4750
N = 600
(3/4)(C + 300p) = 7500
C + 300p = 10000
(3/4)(C + 500p) = 12000
C + 500p = 16000
200p = 6000
p = 30
C = 10000 - 300(30) = 1000
E = 1000 + 30N
---------------------------
(1/4)(1000 + 30N) = 4750
N = 600
收錄日期: 2021-04-24 09:57:17
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101229000051KK01750