2
( 3)
1
3 2
0 ( 2017)
2 3
a
10n
1
a
10
n
a
2
0.813
8.13
MON
2
m
2 2
2
3
3 3
n
3
2
m
3n
m
2
3
n
2m
3
n
2
m
3
n
ABC
10%
A B C
'
'
'
'B
B
10%
10%
(1 10%)
ABCD
AC BD
O
AC BD
BO DO
AO BD
ABCD
AB AD
AC BD
A
B
A
B
55
cm
35
cm
55
35
35
4
6
4 4
3 2
x
1
x
1
4 4
0
0
4
6
34
4 4
6
14
4 4 6
1
1x
2
3
y
x
2 3
x
k
y
k
x
x
0
MNOK
ABCDEF
OK
AB
B
KM
BC
C
MN
CD
B M
A B
CA CB
A
B
M N
AM AC
BN BC
MN
m
C
200
m
p
q
min
,p q
p
q
min 1,2
1
min
2,
3
min (
x
2
1) ,
2
x
1
x
A
B C
p
A B C
AB
2
BC
1
B
O
1 ~ 5
A C
p
C
p
C
CO
28
p
40%
50%
2
( 1)
2
0
2
1
2
2
2
3
n
AB
16
O AB
C
OB
O
270
COD AP BQ
O B
CD
OC
P Q
P
Q AB
OP
AP BQ
BQ
4 3
APO
QD
COD
OC
xOy
(0,5)
A
x
5
x
D
y
3
8
x
39
8
x
x
5
C E
B
E
x
AB
C E
AB
S
S
CDE
S
ABDO
S
S
ABDO
AOC
S
AOC
S
x
CDE
S
CDB
AOC
CDB
ABCD
AB
10
AD
15
tan
A
4
3
P
AD
PB
PB
P
90
PQ
DPQ
10
APB
tan
ABP
: tan
A
3: 2
Q
B
ABCD
PB
PQ
Q
x
y
x
0
x
x
n
n
1
n
12
x
22
n
2
kn
9(
k
3)
k