1. only y
2. only x
3. both x and y
4. neither x nor y
neither x nor y
1. coplanar
2. collinear
3. non-coplanar
4. none
coplanar
1. collinear
2. coplanar
3. non-coplanar
4. none
coplanar
1. collinear
2. coplanar
3. non-coplanar
4. none
coplanar
1. coplanar
2. collinear
3. non-coplanar
4. none
coplanar
1. coplanar
2. collinear
3. non-coplanar
4. none
coplanar
1. [c-a b d]=0
2. [b-d a c ]=0
3. [a-b c d]=0
4. [c-d a b]=0
[c-a b d]=0
1. [r-a b d]=0
2. [r-b c d]=0
3. [r-d a b]=0
4. none
[r-a b d]=0
1. [r b-a d]=[a b c]
2. [r b-a d]=[a b t]
3. [r b-c a]=[a b d]
4. [r c-a b]=[a c d]
[r b-a d]=[a b t]
1. [r-(i+j+k) 2i+3j-k i+2j+3k]=0
2. [r 2i+3j-k i+2j+3k]=0
3. [r-(i+j+k) i+2j-2k j+2k]=0
4. [r i+2j-2j-k j+2k]=0
[r-(i+j+k) 2i+3j-k i+2j+3k]=0