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Let vec u be a vector coplanar with the ...

Let `vec u` be a vector coplanar with the vectors `vec a = 2 hat i + 3 hat j - hat k` and `vec b= hat j+hatk` If `vec u` is perpendicular to `vec a` and `vec u.vecb=24` then `|vecu|^2` is equal to

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JEE MAINS PREVIOUS YEAR ENGLISH-JEE MAINS-All Questions
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