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Let `vec a,vecb` and `vec c` the non-zero non-coplanar vectors.Let the position vectors of four points `A,B,C` and D be `vec a-vec b+vec c,lamda vec a-3vec b+4vec c,-vec a+2vec b-3vec c` and `2vec a-4vec b+6vec c` respectively.If `vec (AB),vec (AC)` and `vec (AD)` are coplanar, then `lambda` is equal to..........

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JEE MAINS PREVIOUS YEAR-JEE MAINS 2023 JAN ACTUAL PAPER-Question
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