Question

find
slope of
two pont
( G (7,1) and (-3, 1)
R.

​

Answer 1

Answer:

1 st quadrant and 3rd quadrant

Answer 2

Answer
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x
2
+y
2
−2ax−2by+b
2
=0
differentiatew.rtox
dx
dx
2

​
+
dx
dy
2

​
−2a
dx
dx
​
−2b
dx
dy
​
+
dx
db
2

​
=0
2x+2y
dx
dy
​
−2a−2b
dx
dy
​
+0=0
dx
dy
​
(2y−2b)=(2a−2x)[
∵Twotangentareperpendicular
thentheirproductis(−1)
​
]
dx
dy
​
=
a−b
a−x
​
[Letmistangentdrawn]
[
dx
dy
​
]
(0,0)
​
=
0−b
a−0
​
=
b
−a
​
=m
m×m
1
​
=−1,
b
−a
​
×m
1
​
=−1,
∴m
1
​
=
a
b
​

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Ans.
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