急：1.In each of the years 1983 and 1984,the total number of automobiles sold in London was 1.2 million more than in the previous year.比较Percent increase in the number of automobiles sold in 1983 over 1982与Percent increase in the number of au

急：1.In each of the years 1983 and 1984,the total number of automobiles sold in London was 1.2 million more than in the previous year.比较Percent increase in the number of automobiles sold in 1983 over 1982与Percent increase in the number of au
急：
1.In each of the years 1983 and 1984,the total number of automobiles sold in London was 1.2 million more than in the previous year.比较Percent increase in the number of automobiles sold in 1983 over 1982与Percent increase in the number of automobiles sold in 1984 over 1983.前者大
如何算?题目未给1983年比1982年多出的汽车销售量啊
2.x is the sum of the first 25 positive even integers.Y is the sum of the first 25 positive odd integers.比较x与y+25的大小 一样大 咋算?

急：1.In each of the years 1983 and 1984,the total number of automobiles sold in London was 1.2 million more than in the previous year.比较Percent increase in the number of automobiles sold in 1983 over 1982与Percent increase in the number of au
1、你是没有看懂题目,所以不会做.题目说的很明白,1983和1984年都比上一年增长了1.2百万,也就是1983比1982多1200万,1984又比1983多1200万,分子都是1200万,分母当然是1982年的比较小,所以1983年的增长率（百分比）比1984年高.
2、第一个奇数是1,第一个偶数是2,各数25个,每个偶数都比相同位次的奇数大1,到25个数加起来的时候,偶数这组当然比奇数那组大25了.

1. 设82年的总销售额为：x，则83年增长率为1.2/x  ,84年增长率为1.2/(x+1.2)

      x<(x+1.2),1.2/x >1.2/(x+1.2).故，前者大。

2.x=2+4+6+…… +50

   y=1+3+5+……+49 

   故x=y+25