Diketahui a=i+2j+pk dan b=-3 + 4j -5k. Jika nilai a.b=0 maka nilai p adalahd
3.
A(-1, 1, p) –> |A| =√(1+1+p²) = √(p²+2)
B(3, -3, 0)–>|B| =√(9+9+0)= √18
p² + 2= 18
p = √16
p = 4 atau p = – 4
p= 4 –> A(-1, 1, 4) –>|A| = √18 = 3√2
vektor satuan a =3√2 (-1, 1 , 4)
p = – 4 –> A(-1, 1, -4) –> |A| = 3√2
vektor satuan a = 3√2 (-1, 1, – 4)
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