Question

Find the inner product of vectors a and b if a = (3, 0, –1) and b = (4, –2, 5,) and state whether the vectors are perpendicular.

Find the inner product of vectors a and b if a=(4,-2,-2) and b= (-7,-2,4) , and state whether the vectors are perpendicular.

Answer 1

a.b = 3*4 + 0*-2 + -1*5 = 12 - 5 = 7
not perpendicular, since a.b not zero

do other one likewise