If the vertices of a triangle ABC are A(1, 2, 1), B(4, 2, 3) and C(2, 3, 1), then the equation of the median passing through the vertex A, is
Answer & explanation
Correct answer: option 4
$M = \left(\frac{4+2}{2}, \frac{2+3}{2}, \frac{1+3}{2} \right)$
$M = (3, \frac{5}{2}, 2)$
so $\frac{x-1}{3-1}=\frac{y-2}{\frac{5}{2}-2}=\frac{z-1}{2-1}$
Equation of median = $\frac{x-1}{2}=\frac{y-2}{\frac{1}{2}}=\frac{z-1}{1}$
Option: 4