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Let the position vectors of the points `Pa n dQ` be `4 hat i+ hat j+lambda hat ka n d2 hat i- hat j+lambda hat k ,` respectively. Vector ` hat i- hat j+6 hat k` is perpendicular to the plane containing the origin and the points `Pa n dQ` . Then `lambda` equals a`-1//2` b. `1//2` c. `1` d. none of these

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Let the position vectors of the points Pa n dQ be 4 hat i+ hat j+lambda hat ka n d2 hat i- hat j+lambda hat k , respectively. Vector hat i- hat j+6 hat k is perpendicular to the plane containing the origin and the points Pa n dQ . Then lambda equals 1//2 b. 1//2 c. 1 d. none of these

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Find a unit vector perpendicular to both the vectors 4 hat i- hat j+3 hat k\ a n d-2 hat i+ hat j-2 hat kdot

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