F2 maths - formula

1.A=K(1-V)
A/K=1-V
V+A/K=1
V=1-A/K


2.x/a+y/b=1
ax+by
_______=1
ab
ab(x+y)=ab
x+y=ab/ab
y=1-x


3.s= ut+1/2at
s-ut=1/2at
2at(s-ut)=1
2at=1/s-ut
a=1/2t(s-ut)



4.A=P+Pnr/100(???????)



5.x=L(1+at)
xL=1+at
xL-1=at
a=xL-1/t

2007-05-27 15:13:50 補充：
4.A=P+Pnr/100 A=100P+Phr/100100A=P(100+nr)P=100A/100+nr

1.v=A/k-1
2.y=(ab-xb)/b
3.a=[2(s-ut)]/t
4.?????
5.(x-L)/Lt