tiaotiao1985
你查年金现值系数表(p/a,i,n)和复利现值系数表(p/f,i,n),用r1=5%,r2=6%, 5% 4*(p/a,5%,5)+100(p/f,5%,5)=a r 95 6% 4*(p/a,6%,5)+100(p/f,6%,5)=b (r-5% )/(6%-5%)=[95- a]/[ b- a] 求r即可.

大锅饭饭饭饭
你查年金现值系数表(p/a,i,n)和复利现值系数表(p/f,i,n),用r1=5%,r2=6%,5% 4*(p/a,5%,5)+100(p/f,5%,5)=a r 956% 4*(p/a,6%,5)+100(p/f,6%,5)=b(r-5% )/(6%-5%)=[95- a]/[ b- a] 求r即可....
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