Re: [計量] pp3一題
※ 引述《nyyfan0325 (追夢者)》之銘言:
: 看不懂後半段再說甚麼...
: T is no more than 20 percent greater than the integer x,
: and T is no smaller than a number 20 percent less than the integer x.
: If T = 60, which of the following indicates the smallest possible interval
: of x?
: A 40<=X<=80
: B 48<=X<=75
: C 48<=X<=72
: D 50<=X<=78
: E 50<=X<=75
: 以上都是大於等於 和小於等於 只是符號打不出來...
: 答案是E
: 麻煩大家了 謝謝!!!!
前半:T不會大於1.2x ...... T<=1.2x
後半:T不會小於0.8x ...... T>=0.8x
因為T=60 可以得到 50<=x<=75
(題目要找"最小"的間距; x若介於50和75之間,勢必也介於40和80之間)
※ 編輯: nehsband 來自: 140.112.4.181 (04/03 15:17)
推
04/03 15:43, , 1F
04/03 15:43, 1F
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04/04 22:55, , 2F
04/04 22:55, 2F
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04/04 23:56, , 3F
04/04 23:56, 3F
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04/06 11:54, , 4F
04/06 11:54, 4F
→
04/06 11:54, , 5F
04/06 11:54, 5F
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