Mathematics · 2022
JEE Main · 29 June 2022, Shift 1 · Q3
If the mirror image of the point (2, 4, 7) in the plane 3 x-y+4 z=2 is (a, b, c), then 2 a + b +2 c is equal to:
If the mirror image of the point ($\displaystyle 2$, $\displaystyle 4$, $\displaystyle 7$) in the plane $\displaystyle 3 x-y+4 z=2$ is (a, b, c), then $\displaystyle 2 \mathrm{a}+\mathrm{b}+2 \mathrm{c}$ is equal to :
Official answer
(3)
$\displaystyle -6$
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JEE Main 2022 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.