Let the Mirror Image of the... | JEE Main 2022 | Vector & 3D

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JEE MAIN 2022

27-06-2022 S1

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Let the mirror image of the point $(a, b, c)$ with respect to the plane $3 x-4 y+12 z+19=0$ be $(\alpha-6, \beta, \gamma)$. If $a+ b+c=5$, then $7 \beta-9 \gamma$ is equal to $\_\_\_\_$ .

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