1
. 1
1 ab=ab5a=5a1a=aaa= a2
2 s=vt :
s=a.as= a2
3 C=4a S=ab C=2.(a+b)=2(a+b)
2 a 2 a a2
02 2 aa2
1 s v t
s=vt v=st t=s v
2 a b c
c=ab
a=cb
b=ca
3 a t c
c=at
t=c a
a=ct
3
1
=+ 2 C =a+b
= S =a
2
= 4 C =a4=4a
= S =aa S= a 2
0 100
10 a0
2 0 a0= a
3 0 a0= a
4 0 aa = 0
4 0 0 a0= 0
50 0 0 0aa0= 0
100
