The order of the differential equation of all circles of given radius a is:
The order of the differential equation of all circles of given radius a is:
(A) 1
(B) 2
(C) 3
(D) 4
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Correct answer is (B). Let the equation of given family be (x – h)2 + (y – k)2 = a2 . It has two orbitrary constants h and k. Threrefore, the order of the given differential equation will be 2.
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