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表达式19: "M" Subscript, 1 , Baseline equals StartFraction, "B" Subscript, 1 , Baseline plus "C" Subscript, 1 , Baseline Over 2 , EndFraction
M
1
=
B
1
+
C
1
2
19
表达式20: "M" Subscript, 2 , Baseline equals "B" Subscript, 2 , Baseline
M
2
=
B
2
20
表达式21: "N" Subscript, 1 , Baseline equals "D" Subscript, 1 , Baseline plus StartFraction, 1 Over "A" Subscript, "B" , Baseline , EndFraction left parenthesis, "C" Subscript, 1 , Baseline minus "D" Subscript, 1 , Baseline , right parenthesis
N
1
=
D
1
+
1
A
B
C
1
−
D
1
21
表达式22: "N" Subscript, 2 , Baseline equals "D" Subscript, 2 , Baseline plus StartFraction, 1 Over "A" Subscript, "B" , Baseline , EndFraction left parenthesis, "C" Subscript, 2 , Baseline minus "D" Subscript, 2 , Baseline , right parenthesis
N
2
=
D
2
+
1
A
B
C
2
−
D
2
22
表达式23: "m" Subscript, 1 , Baseline equals StartFraction, "M" Subscript, 2 , Baseline Over "M" Subscript, 1 , Baseline , EndFraction
m
1
=
M
2
M
1
23
表达式24: "m" Subscript, 2 , Baseline equals StartFraction, "B" Subscript, 2 , Baseline minus "N" Subscript, 2 , Baseline Over "B" Subscript, 1 , Baseline minus "N" Subscript, 1 , Baseline , EndFraction
m
2
=
B
2
−
N
2
B
1
−
N
1
24
表达式25: "y" equals "m" Subscript, 1 , Baseline "x"
y
=
m
1
x
25
表达式26: "y" equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "B" Subscript, 1 , Baseline , right parenthesis plus "B" Subscript, 2 , Baseline
y
=
m
2
x
−
B
1
+
B
2
26
表达式27: "m" Subscript, 1 , Baseline "x" equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "B" Subscript, 1 , Baseline , right parenthesis plus "B" Subscript, 2 , Baseline
m
1
x
=
m
2
x
−
B
1
+
B
2
27
表达式28: "P" Subscript, 1 , Baseline equals StartFraction, negative "m" Subscript, 2 , Baseline "B" Subscript, 1 , Baseline plus "B" Subscript, 2 , Baseline Over "m" Subscript, 1 , Baseline minus "m" Subscript, 2 , Baseline , EndFraction
P
1
=
−
m
2
B
1
+
B
2
m
1
−
m
2
28
表达式29: "P" Subscript, 2 , Baseline equals "m" Subscript, 2 , Baseline left parenthesis, "P" Subscript, 1 , Baseline minus "B" Subscript, 1 , Baseline , right parenthesis plus "B" Subscript, 2 , Baseline
P
2
=
m
2
P
1
−
B
1
+
B
2
29
Graphs
Graphs
对学生隐藏该文件夹。
30
表达式31: polygon left parenthesis, "A" , "N" , "P" , right parenthesis
p
o
l
y
g
o
n
A
,
N
,
P
31
表达式32: polygon left parenthesis, "C" , "M" , "P" , "N" , right parenthesis
p
o
l
y
g
o
n
C
,
M
,
P
,
N
32
表达式33: polygon left parenthesis, "A" , "B" , "C" , "D" , right parenthesis
p
o
l
y
g
o
n
A
,
B
,
C
,
D
33
表达式34: polygon left parenthesis, "A" , "M" , right parenthesis
p
o
l
y
g
o
n
A
,
M
34
表达式35: polygon left parenthesis, "A" , "N" , right parenthesis
p
o
l
y
g
o
n
A
,
N
35
表达式36: polygon left parenthesis, "B" , "N" , right parenthesis
p
o
l
y
g
o
n
B
,
N
36
Points
Points
对学生隐藏该文件夹。
37
50
技术支持
技术支持
"x"
x
"y"
y
"a" squared
a
2
"a" Superscript, "b" , Baseline
a
b
7
7
8
8
9
9
over
÷
功能
(
(
)
)
less than
<
greater than
>
4
4
5
5
6
6
times
×
| "a" |
|
a
|
,
,
less than or equal to
≤
greater than or equal to
≥
1
1
2
2
3
3
negative
−
A B C
StartRoot, , EndRoot
pi
π
0
0
.
.
equals
=
positive
+
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