JEE PYQ: Vector 3D Question 58
Question 58 - 2019 (10 Apr Shift 2)
If the plane $2x - y + 2z + 3 = 0$ has the distances $\frac{1}{2}$ and $\frac{2}{3}$ units from the planes $4x - 2y + 4z + \lambda = 0$ and $2x - y + 2z + \mu = 0$, respectively, then the maximum value of $\lambda + \mu$ is equal to:
(1) $9$
(2) $15$
(3) $5$
(4) $13$