if the points P ( -4,6,10) ,Q ( 2,y,6) and R (14 , 0 ,-2) are such that Q trisects the line segment PR and is nearer to P . find the value of y .
if the points P ( -4,6,10) ,Q ( 2,y,6) and R (14 , 0 ,-2) are such that Q trisects the line segment PR and is nearer to P . find the value of y .