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329.investment principal $6000, quarterly interests: 1Q $124; 2Q $135 3Q$141, what annual interest rate can make yearly interest 10% 3.5%, 9%, 10.% 10.5%, 12.5% 请问为什么? Annul interest rate不是yearly interest rate? 注意复利计算: Annual Rate R,compounded by quarter, the yearly rate should be
(1+R/4)^4 ?????? 什么意思 annual rate 呢 比如说为8% *这是固定的* 可能有几种计息方法,比如分季度那就先用8%/4=2%得出季度利率 因为一年四季嘛 yearly rate=(1+2%)^4 比如分月那就先用8%/12=0.75%得出季度利率 因为一年12月嘛 yearly rate=(1+0.75%)^12 yearly rate 是根据计息方法而变得 而annual rate 是 小川 和 老胡等人 商量好的
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