1.

Which of the below given is the correct formula for the distance between two skew lines l1 and l2?

A. d= ( left | frac{( vec{b_1} vec{b_2}).(a_2-a_1)}{| vec{b_1} vec{b_2}|} right | )
B. 2d= ( left | frac{( vec{b_1}- vec{b_2}).(a_2-a_1)}{| vec{b_1}- vec{b_2}|} right | )
C. d= ( left | frac{( vec{b_1} vec{b_2}).(a_2.a_1)}{3| vec{b_1} vec{b_2}|} right | )
D. d<sup>2</sup>= ( left | frac{( vec{b_1} vec{b_2}).(a_2-a_1)}{| vec{b_1}- vec{b_2}|} right | )
Answer» B. 2d= ( left | frac{( vec{b_1}- vec{b_2}).(a_2-a_1)}{| vec{b_1}- vec{b_2}|} right | )


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