Bantu ya ini tentang materi vektor dipkek skrng

PQ = Q – P

= (3,5,1) – (-4,0,-4)

= (7, 5, 5)

QR = R – Q

= (4, 7, 3) – (3, 5, 1)

= (1, 2, 2)

PQ . QR = (7 . 1) + (5 . 2) + (5 . 2)

= 7 + 10 + 10

= 27

|QR| = √(1)^2 + (2)^2 + (2)^2

= √1 + 4 + 4

= √9 = 3

misal proyeksi PQ thd QR adl c, maka

c = PQ . QR / |QR|

= 27/3

= 9

Jadi, proyeksi skalar orthogonal vektor PQ dan QR adl 9