原题：What is the present value of an infinite set of cash flows worth $4822 per year,if the interest rate is 11.7%?41214.不知道用的是什么公式,infinite set of cash flow 请问，关于原题，如何计算？用什么公式？

先看三个句子1.There is a book of his 2 You are a big fan of Phelps 3what is the shape of your prese为什么1用了双重所有格而2.3.不用呢? IS that correctWe have so many presentations during this semester.Thanks goodness we only have one final presentation in English2.That is what I was thinking when I check the schedule of text.As the opinion of many students ,we don´t like prese out of the past怎么翻译(1/2)for it is out of the past that the nation has traveled to its prese(2/2)nt 这句又怎么翻译？ what is your plan for the winter holidays?保持原句意思不变怎么做 What a quick runner the boy is!(保持原句意思） How___the boy___! This factory is ______ the one we visited last week.正确答案是the one,但为什么不是表语从句用what?上面原题貌似笔误了，原题是This factory is ______ we visited last week.为什么不能是what? What is Jane?(保持原句意思) 硫酸和氢氧化钡反应生成硫酸钡和水.求硫酸到硫酸钡摩尔分数原题:what is the mole ratio of sulfuric acid to barium hydroxide? what is theMSNmean?如题! What is the ERG Theory?如题～ what is the date what is the meaning? What is the matter? what is the story What is the happiness? What is the love? what is the pencil what is the matter?