JEE PYQ: Vector Algebra Question 24
Question 24 - 2020 (06 Sep Shift 2)
If $\vec{x}$ and $\vec{y}$ be two non-zero vectors such that $|\vec{x} + \vec{y}| = |\vec{x}|$ and $2\vec{x} + \lambda \vec{y}$ is perpendicular to $\vec{y}$, then the value of $\lambda$ is _____.