If A is the initial amount put into an account, R is the annual percentage of interest written as a decimal, and the interest co

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问题 If A is the initial amount put into an account, R is the annual percentage of interest written as a decimal, and the interest compounds annually, then what would be the expression, in terms of A and R, for the interest accrued in three years?

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答案A(1+R)3-A

解析 题目问的是:如果A是放入账户中的本金,R是写成小数形式的年利率,利息每年复利一次,则3年累积的利息用A和R来表示的表达式是什么?在复利模式下计算一段时间内积累的利息,需用到期后的终值减去本金。3年后的本息和为A(1+R)3,本金为A,3年累积的利息为A(1+R)3-A。
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