Question

mcq related to matrices and determinants
20. If A=[a b] and B =[cd], then AB is equal to
a. [ac ad bc bd]
b. [ac + bc ad+bd]
C. [ac + bc ad + bd]
d. [ac bd]​

Answer 1

Answer:

D is correct.

Step-by-step explanation:

A=[a b] and B=[c d] then

AB= [a b] [c d] then

AB= [a*c b*d]

Therefore AB= [ac bd].