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Parabola: Focus and Directrix
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Expression 16: "a" equals 5.1
a
=
5
.
1
negative 10
−
1
0
10
1
0
16
Parabola: Horizontal Axis
Parabola: Horizontal Axis
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17
Horizontal Axis: Distance FP=PD
Horizontal Axis: Distance FP=PD
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29
Expression 32: "b" equals 0
b
=
0
negative 10
−
1
0
10
1
0
32
33
powered by
powered by
F (0,3)
left parenthesis, 0 , 0 , right parenthesis
0
,
0
P(x,y)
D (x,-3)
d
d
"x"
x
"y"
y
"a" squared
a
2
"a" Superscript, "b" , Baseline
a
b
7
7
8
8
9
9
over
÷
functions
(
(
)
)
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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