Question

the vector 5i^+2j^-lk^ id perpendicular to the vector 3i^+j^+2k^ for l=

Answer 1

Answer:

I=17/2

Explanation:

dot product will be zero

==5×3+2×1+2×(-I)=0

a vector dot b vector = magnitude of a × magnitude of b × cos of angle between them

since they're perpendicular cos90=0

= coefficients of i cap + coefficients of y cap + coefficients of j cap =0...

Answer 2

Answer:

so finally we got I as 17/2