diketahui koordinat titik A (2,-1) dan B (-4,2). tentukan koordinat titik C jika AC:CB = 2:1

C = 1/(2+1) × (1×A + 2×B)
C = 1/3 ×(A + 2B)
C = 1/3 × ((2,-1) + 2(-4,2))
C = 1/3 × ((2, -1) + (-8, 4))
C = 1/3 × (-6, 3)
C = (-2, 1)

C=(2B+A)/3
=(2(-4,2)+(2,-1))/3
=((-8,4)+(2,-1))/3
=(-6,3)/3
=(-2,1)