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Question

The order of the differential equation of the family of all concentric circles centred at h,k is


A

1

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B

2

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C

3

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D

4

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Solution

The correct option is A

1


Explanation for the correct option

Equation of the circle : (x-h)2+(y-k)2=r2 where r is the radius of the circle

Here h,k are given constants and only radius r is the variable.

Therefore given equation contain only 1 variable

So the order of the differential equation is 1

Hence, the correct option is A.


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