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Re:第二个sample..

Posted by RoBa at 2006-08-04 14:01:13 on Problem 2910
In Reply To:就是连续几个月都要用同一个insititution的利率 Posted by:frkstyc at 2006-08-04 13:40:18
开始时 本金300

第一月 利息7% 本利和300*(1+7%)=321 还100 剩余221
第二月 利息5% 本利和(221+4)*(1+5%)=236.25 还100 剩余136.25 (4元罚金)
第三月 利息10% 本利和136.25*(1+10%)=149.875 还100 剩余49.875
第四月 利息10% 本利和49.875*(1+10%)=54.8625 还54.8625

总计还 354.8625?

为什么答案是354.85?

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