yang bisa jawab dapat pulsa 25.000 1. Diketahui vektor a = (-1, 2, 3), b = (0, -2, -1), dan c = (-1, -2, 3). Hitunglah: a. 2a + b b. -b - 4a c. 3a - 2b + 4c

a)
2a+b
= 2 ( -1,2,3)+ (0,-2,-1)
= (-2,4,6) +(0,-2,-1)
= (-2,2,5)
b)
-b-4a
=-(0,-2,-1) - 4(-1,2,3)
= (0,2,1) - (-4,8,12)
= (4,-6,-11)

c)
3a - 2b + 4c
= 3(-1,2,3) -2(0,-2,-1) +4(-1,-2,3)
= (-3,6,9)-(0,-4,-2) + (-4,-8,12)
= (-7 , 2, 23)