Question

9 Which of the following vectors is not perpendicular to vector u = (-5, 2, 1)? A. v = (3, 7, 1) B. v = (-2,-10, 10) C. v = (1, 2, 1) D. v = (4,5,8) =​

Answer 1

Answer:

D. v=(4.5.8)

Two vectors are perpendicular if their dot product is zero.

here,

u=(-5,2,1)

v=(4,5,8)

u.v= -5(4)+2(5)+8=-20+10+8=-2

thus

u.v≠0

thus

u and v are not perpendicular vectors

plz mark as brainlist.