Question:medium
The straight line passing through the points $(3,2,3)$ and $(5,-1,-2)$ is perpendicular to the straight line passing through the points $(1,3,1)$ and $(\alpha, \alpha, \alpha)$. Then the value of $\alpha$ is equal to
The straight line passing through the points $(3,2,3)$ and $(5,-1,-2)$ is perpendicular to the straight line passing through the points $(1,3,1)$ and $(\alpha, \alpha, \alpha)$. Then the value of $\alpha$ is equal to
Show Hint
In 3D geometry, "perpendicular" always translates to "Dot Product = 0". Use this immediately after finding direction ratios.
Updated On: Jun 24, 2026
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The Correct Option is B
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