[中學] 求助!有關指對數
請問有數學高手可以寫以下的推導式子給我看嗎?非常感謝!!
不是帶數字進去算那種，我想看推導式。
15. The cost of a piece of machinery is increased from X = 80 to Y = 84.
Which of the following expressions is closest to the actual percentage
increase in the cost?
A. 100(Y/X)
B. 100 ln(Y-X)
C. 100[ln(Y)-ln(X)]
D. 100[ln(Y)/ln(X)]
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※ 編輯: fanlian 來自: 216.165.95.74 (08/05 12:45)
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08/05 18:27, , 1F
08/05 18:27, 1F