※ 引述《uuhambur (威尔柏 )》之铭言： : Q11: : A certain business produced x rakes each month form November through : February and shipped x/2 rakes at the beginning of each month from March : through October. The business paid no storage costs for the rakes from : November through February, but it paid storage costs of $0.10 per rake : each month from March through October for the rakes that had not been shipped. In terms of x, what was the total storage cost, in dollars, that the business paid for the rakes for the 12 months form November through October? : A. 0.40x : B. 1.20x : C. 1.40x : D. 1.60x : E. 3.20x : 请问此题怎解?THX 先用笨方法算 11月到隔年2月 总产量4x 3月到10月 每个月寄1/2x 计价的库存是「当月未寄出」 所以三月会计价的库存是 (4-0.5)x 以此类推到10月就全部寄光光了 库存计价是(3.5+3+2.5+2+1.5+1+0.5+0)x X $0.10 = $1.4x 其实就是等差级数 我会建议这种题目，先看一次，不懂就列表 通常数字都很好算 -- 什麽是签名档 可以吃吗？ --

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