how could you make sure of 9% by the trial and err

问题补充：

how could you make sure of 9% by the trial and error method?hi,there!i do not know who you are,buddy.however,i read you article over this webpage,regarding to caculation of real interest rate,where i

答案：

虽然我们并不认识,但是我看了你写的关于实际利率的计算那篇文章.我注意到你在初审和错误方法的插图中以9％作为起始年金和复利.我想问问在年金表和复利表中,你如何得出初期为9％呢?

非常感谢你的指教

gabriel

（我可不懂会计,专业术语可能有误,不过你应该能看得懂:D）