Question
Mathematics Question on Vector Algebra
If A(1,2,3) B(3,7,-2) and D(-1,0,-1) are points in a plane, then the vector equation of the line passing through the centroids of △ABD and △ACD is
A
r = (2i - j) + (j + 4k)
B
r = (1 + t)i +3j + 3tk
C
r = (2i +3j + 3k) +t(i + 3j)
D
r = (i + j + k) + t(2i - j)
Answer
r = (1 + t)i +3j + 3tk
Explanation
Solution
The correct option is: (B) r = (1 + t)i +3j + 3tk