题目

1.You are saving for a new car which will cost $14500.You save by putting $200 a month into a saving account which gives 0.1%interest a month .After how many months will you be able to afford to buy the car
2.Find the coordinates of the points on the curve with equation y=4x-(16/3)x^3 where the tangents to the curve are parallel to the x-axis .
楼下的高手:
第一题怎么得出结论的?有个关系式吧

提问时间：2021-02-10

答案

【【【公式】】】S=R(((1+i)^n-1)/i)(1+i) 其中S为14500,r为200,n为要求的月数,i为0.1%,带进去算得出以下结论.翻译：1.你想买一辆14500美金的新车,于是你每个月把200块钱存到一个账户里面,这个账户每月底有0.1%的利...