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Byju's Answer
Standard XII
Mathematics
Radical Axis
Find the imag...
Question
Find the image of the circle
x
2
+
y
2
−
6
x
−
8
y
=
0
in the line
3
x
+
4
y
+
25
=
0
.
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Solution
Image of circle along line
⇒
P
line is Radical axis of circle.
∴
S
−
S
′
=
3
x
+
4
y
+
25
x
2
+
y
2
−
6
x
−
8
y
−
x
2
−
y
2
−
2
q
x
−
2
f
y
−
c
=
3
x
+
4
y
+
25
(
−
6
−
2
a
)
x
+
(
−
8
−
2
S
)
y
−
(
∴
3
x
+
4
y
+
25
⇒
6
+
g
=
−
3
g
=
−
9
/
2
∣
∣
∣
−
8
−
2
f
=
4
f
=
−
6
∣
∣
∣
−
c
=
25
c
=
−
25
∣
∣
∣
∴
x
2
+
y
2
−
9
x
−
12
y
−
21
=
0
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Similar questions
Q.
The shortest distance from the line 3x + 4y = 25 to the circle
x
2
+
y
2
−
6
x
+
8
y
=
0
is equal to (in units)
Q.
The shortest distance from the line
3
x
+
4
y
=
25
to the circle
x
2
+
y
2
=
6
x
−
8
y
is equal to
Q.
Find the image of the circle
x
2
+
y
2
−
2
x
+
4
y
−
4
=
0
in the line
2
x
−
3
y
+
5
=
0
.
Q.
If the circle
x
2
+
y
2
+
8
x
−
4
y
+
c
=
0
touches the circle
x
2
+
y
2
+
2
x
+
4
y
−
11
=
0
externally and cuts the circle
x
2
+
y
2
−
6
x
+
8
y
+
k
=
0
orthogonally then
k
=
Q.
The pole of
3
x
+
4
y
−
45
=
0
with respect to the circle
x
2
+
y
2
−
6
x
−
8
y
+
5
=
0
is
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