1
Bn
AB
Am Bn
A±B m±n
y=ax+byb a
y=ax b yb a
ax
12=3×4≠2×6
3 a9 4 5
B aC AB×C A BC
Am
m
n
=
x
50
0
2
= ÷
= ×
n
n
n
2n1s=v×t
n
n=v×t
n=v×t
s=v×t
s=v×t
s=v+v ×t
s=vv×t
= +
= × s=v×t
÷
s vt
v st
t sv
2v
1
×v
2
v
1
+v
2
= ÷
=
= ÷
= ×
4?#~Y#?L N?
3
+1
ABA∩B
ABCA∩BA∩C B∩C A∩B∩C
ABC ×2
1
2
÷
1
k???
4
??L5B+
?? ??
>? l ??
.? ??
5,8 ??
?? ??
= + = ×+r
= = ÷1+r
r r
+%
r= ÷
÷ 2 ÷
÷ 2 ÷
5
+
= ÷
r
= = ×r= ×r
1+r
ara≈ ≈ ≈
N1N+1
1
N
F
国考笔试数资导图.pdf