天才和笨蛋
年票面利息=1250*4.72%=59實(shí)際利率i計(jì)算59*(P/A,i,5)+1250*(P/S,i,5)當(dāng)i=10%時(shí),算式=59*3.7908+1250*0.6209=999.78當(dāng)i=9%時(shí),算式=59*3.8897+1250*0.6499=1041.87插枝法:i=9% 1041.87 i 1000i=10% 999.78實(shí)際利率i=9%+(10%-9%)*(1041.87-1000)/(1041.87-999.78)=9.99%你可以查一下復(fù)利現(xiàn)值系數(shù)表和年金現(xiàn)值系數(shù)表
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