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TS EAMCET · Maths · Differential Equations

The solution of the differential equation \(x y^2 d y-\left(x^3+y^3\right) d x=0\) is

  1. A \(y^3=3 x^3+c\)
  2. B \(y^3=3 x^3 \log (c x)\)
  3. C \(y^3=3 x^3+\log (c x)\)
  4. D \(y^3+3 x^3=\log (c x)\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(y^3=3 x^3 \log (c x)\)

Step-by-step Solution

Detailed explanation

Given differential equation can be rewritten as \[ \frac{d y}{d x}=\frac{x^3+y^3}{x y^2} \] It is a homogeneous differential equation. Put \[ y=v x \Rightarrow \frac{d y}{d x}=v+x \frac{d v}{d x} \]…