The point of trisection of line segment joining the point A(2,1)  and B (5,3),  are:

let P1  and P2  are the points which trisect the line segment joining the points A(2,1)  and B (5,3), P1(x,y)=(1×5+2×21+2,1×3+2×11+2)=(3,53) P2(x,y)=(2×5+1×21+2,2×3+1×11+2)=(4,73)