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2019ввϷеĸ

2019-09-24 09:52:39| й

вDzֵƸص㿼ݣв֪ʶҲʮֱҪģйս߿Ƹвص㣬ΪһݣҲοѧϰ

вϷеһ㣬ڿо֣Ĺʽǣ=q1+q2+q1×q2(Уq1ָʣq2ָ),q1+q2ȽϺü㣬ǷҪq1×q2ҪѡҪq1×q2ָȥټ?Щ⣬йһһӦȥʡ

һѡҪ

1.2017꣬ҹģϻҵҵ7101Ԫ20.8%17.4%

⣺2015ȣ2017ҹģϻҵҵ( )

A.41.8% B.37.2% C.33.5% D.28.8%

𰸡A

йɲϿ֪2017ҹģϻҵҵ20.8%201617.4%=20.8%+17.4%+20.8%×17.4%=38.2%+20.8%×17.4%>38.2%ѡд38.2%ֻ41.8%ʴѡA

ڶ

ȽСʱɺ

ļ㣬ѡй

2.2017ҹģΪ41.6β4.5%ͬΪ1.2%

⣺2017ҹģ2015( )

A.5.11% B.5.36% C.5.75% D.6.13%

𰸡C

йɲϿ֪2017ҹģ4.5%20161.2%=4.5%+1.2%+4.5%×1.2%=5.7%+4.5%×1.2%>5.7%ųABΪ4.5%1.2%Сdz˻֮Ժԣѡ5.7%Դһ5.75%ʴѡC

ǺСҸѡѡʱ

м

q1×q2ļ㣬ļ㲽Ϊٺٷֺţȡ;ӰٷֺţСǰƶλ

3.20186ȫֽΪ16.2֣ͬ½15.1%0.6ٷֵ㡣

⣺20186ȫֽ20166ͬڼ( )

A.30.26% B.29.74% C.28.43% D.27.31%

𰸡C

йɲϿ֪20186ȫֽ-15.1%20176-(15.1%+0.6%)=-15.7%=-15.1%-15.7%+15.1%×15.7%=-30.8%+15.1%×15.7%ٵֵС30.8%ѡ𰸡15.1%×15.7%ܺԣһٷֺţȡΪ15×16=240ڶӰٷֺţСǰƶλ2.4%ԭʽ=-30.8%+2.4%=-28.4%ѡӽ½28.43%ʴѡC

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