Question

if a vector 2i+3j+8k is perpendicular to the vector 4i-4j+ak find the value of n is​

Answer 1

Explanation:

Since vector A and vector B are Perpendicular

vector A . vector B=0

(2i+3j+8k)(4i−4j+ak)=0. (i²=1)(j²=1)(k²=1)

8−12+8a=0

a= 4/8

a=1/2

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