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Questions  >>  CBSE XII  >>  Math  >>  Vector Algebra
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The vector $\hat i+\lambda\hat j+\hat k,\hat i+\hat j-\hat k$ and $3\hat i+6\hat j-5\hat k$ are coplanar if

\[(A)\;\lambda=-2\quad (B)\;\lambda=0\quad(C)\;\lambda=1\quad (D)\;\lambda=-1\]

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