Question

Kak tolong kasih tau penyelesaian dari soal ini ya, terima kasih ☺
Jika A = i + 3j - 2k dan B = 4i-2j+4k, carilah :
a. | A |
b. | B |
c. A.B
d. A x B

Answer 1

A) lAl = V(1^2+3^2+(-2)^2)
= V(1+9+4)
=V14

b) lBl = V(4^2 + (-2)^2 + 4^2)
= V(16+4+16)
= V 36
= 6

c) A.B = (1.4) + (3.-2) + (-2.4)
= 4 -6 -8
= -10

d) A x B = [email protected]
= V14 . 6 . [email protected]
= [email protected]