Question

Order of the differential equation of the family of all concentric circles centered at (h, k) is

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

Answer: (A)

1

Answer 2

$( x - h ) ^ { 2 } + ( y - k ) ^ { 2 } = r ^ { 2 }$. Here r is arbitrary constant

∴ Order of differential equation = 1.