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复制本帖HTML代码
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高亮:
今天贴
X 昨天贴
X 前天贴
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Denote A=PMT-P r
First year principal reduction: A
Second year reduction: A(1+r)
You just abke to fill two pail of water.
Third year: A(1+r)^2
...
30th year: A(1+r)^29
P=A[1+(1+r)+(1+r)^2+...+(1+r)^29]=A[(1+r)^30-1]/r
A=P r/[(1+r)^30-1]
PMT=A+P r
Stay away from mathematics please..
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