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derrick902
Group Title
Find the intersection point between two lines:
L1=<3,5,7>k+<1,2,0>
L2=<3,1,4>t+<1,2,3>
 one year ago
 one year ago
derrick902 Group Title
Find the intersection point between two lines: L1=<3,5,7>k+<1,2,0> L2=<3,1,4>t+<1,2,3>
 one year ago
 one year ago

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experimentX Group TitleBest ResponseYou've already chosen the best response.1
just equate the values of x, y, z from those two lines and find the valeus of k and t. if you don't find singular values ... then they do not intersect.
 one year ago

derrick902 Group TitleBest ResponseYou've already chosen the best response.0
Hey @experimentX . I tried solving this intersection using a similar method you showed me for the line and plane intersection, does it work here as well?
 one year ago

derrick902 Group TitleBest ResponseYou've already chosen the best response.0
Yeah, I found the intersection using the x,y,z components from L1 and L2 and found the correct intersection. I was just wondering if we could solve it using the other way you showed me for the line and plane problem
 one year ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
yeah it works .... just try to find the value of k and t ... from first two equation. put the value on the last equation. If it's invalid then the line does not intersect.
 one year ago

derrick902 Group TitleBest ResponseYou've already chosen the best response.0
Okay, so far I have from L2: 1+3t >k1 2t >k2 34t>k3 and L1: 3k1+5k2+7k3=1 Filling those values from L2 into L1, I get: 1=3(1+3t)+5(2t)+7(34t) 1=39t+105t+2128t t=27/42
 one year ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
lol ... what are you doing?? dw:1350576239788:dw
 one year ago

derrick902 Group TitleBest ResponseYou've already chosen the best response.0
Was what I did not the way i'm suppose to do it? lol
 one year ago

derrick902 Group TitleBest ResponseYou've already chosen the best response.0
I just tried to do it a similar way to the way we solved the line and plane intersection; breaking up the line equation into it's x,y,z components, then filling them into the plane equation, except here there's two lines, so I broke up one of the line equations into it's x,y,z, and filled it into the other line equation
 one year ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
you are making it complicated... we are trying to find the point common to both lines. so just equate x, y and z of both lines.
 one year ago

derrick902 Group TitleBest ResponseYou've already chosen the best response.0
Got it, thanks :D
 one year ago

experimentX Group TitleBest ResponseYou've already chosen the best response.1
well ... trying to find a plane that would contain both lines is not bad either. good pratice for other problems!
 one year ago
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