Question

9.
A vector that is perpendicular to both the vectors a = i-2j+k and b=i-1+k is
(A) -+
(B)-1-2j+k
(C) 1-2j+
(D) i+k
​

Answer 1

Answer:

it is very simple please try to understand this question then you will try all question

Explanation:

in the question it is given that a vector is perpendicular to both vector it means that the angle between two vectors theta is90

so their resultant is zero because the dot products of vector a and b are given as

a.b =ab cos theta

now put the value of a and b and try by yourself if you can't then see my solution

(I-2j+k).(i-j+k)=0

(1.1)i - (2.1)j+ (1.1)k=0

1i -2j + 1k =0

hope it help you ram ram