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Mathematics
Mathematics
Problem
The number of common tangents, to the circles
x
2
+
y
2
−
18
x
−
15
y
+
131
=
0
and
x^2 + y^2 - 18x - 15y + 131 = 0 \text{ and}
x
2
+
y
2
−
18
x
−
15
y
+
131
=
0
and
x
2
+
y
2
−
6
x
−
6
y
−
7
=
0
,
are
x^2 + y^2 - 6x - 6y - 7 = 0, \text{ are}
x
2
+
y
2
−
6
x
−
6
y
−
7
=
0
,
are
(2023 Main, 15 April I) (a) 2 (b) 3 (c) 1 (d) 4
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