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【OG20-P275-260题】
A certain investment earned a fixed rate of 4 percent interest per year, compounded annually, for five years. The interest earned for the third year of the investment was how many dollars greater than that for the first year?
(1) The amount of the investment at the beginning of the second year was $4,160.00.
(2) The amount of the investment at the beginning of the third year was $4,326.40.
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预约讲师一对一题目解析课程题干：设本金是p，求出p即可
条件1：p(1+4%)=4160，充分
条件2：p(1+4%)^2=4326.4，充分
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