8、若销售量增长5%,物价增长2%,则销售额增长( ) A:10% B:3% C:7.1% D:103%

问题描述:

8、若销售量增长5%,物价增长2%,则销售额增长( )
A:10%
B:3%
C:7.1%
D:103%

c

1.05*1.02-1-=0.071
c

C
设原销售量是a,物价是b
(1+5%)a*(1+2%)b
=1.05a*1.02b
=1.071ab
(1.071ab-ab)/ab=0.071=7.1%

A 10%