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OpenStudy (anonymous):
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OpenStudy (anonymous):
OpenStudy (anonymous):
How are the two direction vectors (2,1,3) and (1,1,-6) (answer is from my textbook)? I know that (2,1,3) is a direction vector, but I am getting (-1,-1,6) as my second one. This is what I did: A(2,2,-1) and P(1,1,5). vector AP=(1,1,5)-(2,2,-1)=(-1,-1,6)
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