Q. If the general solution of the differential equation $y' = \frac{y}{x} + \Phi\left(\frac{x}{y}\right),$ for some function $\Phi,$ is given by $y \,ln\,\left|cx\right| \, = x,$ where $c$ is an arbitrary constant, then $\Phi \left(2\right)$ is equal to :
Solution: