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JEE PYQ: Vector 3D Question 13

Question 13 - 2021 (18 Mar Shift 2)

Let the mirror image of the point $(1, 3, a)$ with respect to the plane $\vec{r} \cdot (2\hat{i} - \hat{j} + \hat{k}) - b = 0$ be $(-3, 5, 2)$. Then the value of $|a + b|$ is equal to ______.

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Answer: 1


Learning Progress: Step 13 of 75 in this series