diketahui vektor ā= (1,2,3) b= (5,4-1) c=(4,-1,1) jika d= ā + 2b - 3c tentukan vektor d

d = a + 2b - 3c
= (1,2,3) + 2(5,4,-1) - 3(4,-1,1)
= (1,2,3) + (10,8,-2) - (12,-3,3)
= (1+10-12 , 2+8-(-3) , 3+(-2)-3)
= (-1,13,-2)

jadi vektor d = (-1,13,-2)