kumohon dijawab ku sudah pasrah

AB = (-2,-4,2)
BC = (6,p+1,-6)

AB = k.BC
(-2,-4,2) = k(6,p+1,-6)

6k = -2
k = -1/3
maka
-1/3(p+1) = -4
-1/3p -1/3 = -4
-1/3p = 13/3
p = -13