A) 2
B) 3
C) 4
D) None of these
Correct Answer: A
Solution :
The equation of the family of circles of radius a is \[{{(x-h)}^{2}}+{{(y-k)}^{2}}={{a}^{2}}\]which is a two parameter family of curves. So its differential equation is of order two.You need to login to perform this action.
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