MCQ
If image of point $P\left( {\lambda ,\,2\lambda } \right)$ in the line mirror $x -y + 2 = 0$ is $\left( {\mu ,\,3\lambda } \right)$ , then choose the correct option
- A$\mu - \lambda = 0$
- ✓$\lambda + \mu = 1$
- C$\lambda - \mu = - 1$
- D$\lambda + \mu = 0$
