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1. (Sections 2.11,2.12) The parametric equations of three lines are given below: 4 : (x, y, z) = (1,0,0) + (1,0,-1), TER 19 :

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» Now, I 1-1 0-0 1-0 ED. =100E 10+ 10 lt o - ls and le are not esplanar and so they do not intersect. 1H 7-0 1-ol=10 ttl=! 11& Let the direction ratios of the straight line be a, m, n. 28-m-n=0 ltm-n=0 m 4+2 El the m :. 2, 1,3 are the direction natio28–4–6=0, x+y=2-1=0 Let M=B, then 6-9-2=0, 2+5-2=0 ::R=3, 4=2, 2=4. ... (3, 2,4) is a point on the straight line. .. The requ

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