|
|
楼主 |
发表于 2005-11-29 01:40
|
显示全部楼层
Originally posted by Mason at 2003-9-4 21:20:" D) K/ a& j! \% S2 H
第五题是b,
! i0 Q& s+ {6 R+ X, D& z- u3 H假设经过n年
- L# q, O' B/ K+ z7 [* {A: 10+10(1+0.02)+10(1+0.04)+……(共n项)
4 q$ }; ]. n2 S& h6 z8 H =10{[1+1+(n-1)*0.02]*n/2}=5*n*(2+2*(n-1)*0.01)
7 Y& ^+ b* s; b' a& }% @$ u8 |9 D( IB: 5+5(1+0.01)+5(1+0.02)+.....(共2n项)- t# u3 |; N+ t& _
=5{[1+1+(2n-1)*0.01]*2n/2}=5*n(2+(2n-1)*0 ... ' t! Z* x& B' j3 u" G+ ]
到底是啥啊 i7 R, D3 Q. i
俺完全晕了
- o4 M a7 n3 ^* C+ f0 V: l& h学了三年多化学4 i& X. [6 G' x- B5 ]
数学只剩下高二水平 |
|