Question

5: The differential equation of a family of circles
having the radius r and centre on the x-axis is​

Answer 1

Answer:

y

2

(

dx

dy

)

2

+y

2

=r

2

⇒(x−a)

2

+y

2

=r

2

⇒2(x−a)+2yy

1

=0

⇒(x−a)=−yy

1

⇒y

2

y

1

2

+y

2

=r

2