tolong aku ya nomer 4 dan 5 gak ngerti

AP : PB = 3 : -1
p = 4i + 5j + 4k
cara ada diupload (Jawab A)

5. x = t c

x = (-p+2q i, 4p +q i, p+q k)
tc = (3ti, 6tj, 3tk)

jadi -p+2q = p+q
     q = 2p  (jawab D)