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Vector Algebra

Question
CBSEENMA12032912

Represent the following family of curves by forming the corresponding differential equations (a. b: parameters).
straight y squared equals 4 ax

Solution
The equation of curve is
y2 = 4 a x    ...(1)
Differentiating both sides w.r.t x, we get.
                   2 straight y dy over dx space equals space 4 straight a          ...(2)
From (1) and (2), we get,
                  straight y squared space equals space 2 straight y space dy over dx. straight x space space space space space space space or space space space space straight y space equals space 2 straight x dy over dx
Which is required differential equation.