mohon bantuannya, jgn asal2an ya
Vektor
x = pa + qb
x = p(-1i + 4j) + q(2i + j)
x = -pi + 4pj + 2qi + qj
x = (-p + 2q)i + (4p + q)j
x sejajar c
x = z . c
(-p + 2q)i + (4p + q)j = z (3i - 4j)
-p + 2q = 3z .... (1)
4p + q = -4z .... (2)
(1) + (2)
-4p + 8q = 12z
12p + 3q = -12z
____________ +
8p + 11q = 0
[answer.2.content]
