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Question

The differential equation for all the straight lines which are at a unit distance from the origin is Уt X1 [3011811626]

JEE/Engineering Exams
Maths
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Solution
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Equation of the line: y = ax + b; Distance from the line to origin: d = = 1 → b= Iva2 + 1 So y = ax + Va2 +1 – dy = a (ax i Va? + 1) ~ y' = a and y = y'x + Vy!2 +1(y – xy')2 = y2 +1
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