Q. 12

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We know equation of a line in a plane is

ax + by = 1

Now equation of non-horizontal lines in a plane is given by,

ax + by = 1, a ≠ 0

Now a and b are two constants here we differentiate twice w.r.t y we get,   Since a ≠ 0 then, is the differential equation of all non-horizontal lines in a plane.

Here the order of differential equation of all non-horizontal lines in a plane is 2.

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