题目

一道SAT数学题,要说出题目的意思和答案详解
the first of a sequence of numbers is 1.If each term after the first product of -2 and the preceding term,what is the sixth term of the sequence
第一题答案是-32 是对的，这里还有一题数学题 A salesperson,s commission is K percent of the selling price of a car.Which of the selling price of a car.Which of the following represents the commission,in dollars,on 2 cars that sold for 14000 each 答案是280K

提问时间：2020-10-21

答案

不是楼上的答案
有一个数列,第一个是1,之后的每个数是前一个的-2倍,求第六个数
所以答案是 1*(-2)^5=-32
销售员每卖一辆车从中收到百分之K得钱,问卖两辆14000的车能得到多少回扣.
应该是 14000*2*K/100=280K