diketahui koordinat titik A(-4,5,2),B(2,-1,3),dan C(3,-2,1).tentukan : a.vektor ac dan bc:b.koordinat titik D sehingga AD=2AC-3BC

A. AC = (-4, 5, 2) * (3,-2,1)
= (-12,-10,2)
BC = (2,-1,3) * (3,-2,1)
= (6,2,3)

B. AD = 2AC - 3 BC
= 2(-12,-10,2) - 3(6,2,3)
= (-24,-20,4) - (18,6,9)
(-4,5,2)D = (-42,-26,-5)
D = (42/4, -26/5, -5/2)