1.

The equation of the plane containing the two lines `(x-1)/2=(y+1)/(-1)=z/3` and `x/(-1)=(y-2)/3=(z+1)/(-1)` isA. `8x+y-5x-7=0`B. `8x+y+5z-7=0`C. `8x-y-5z-7=0`D. none of these

Answer» Correct Answer - D
Given lines pass throuhg `(1-1,0)` and `(0,2,-1)` respectively and parallel to the vectors `2hati-hatj+3hatk` and `-2hati-3hatj-hatk`.
`:.[(veca_(2)-veca_(1),vecb_(1),vecb_(2))]=|(-1,3,-1),(2,-1,3),(-2,-3,-1)|=-14!=0`
So the given lines are non-coplanar.


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