Which of the following is the
matrix 𝐴 equals
𝑎 𝑖 [𝑎 𝑖𝑗], where 𝑖 equals one and 𝑗 equals one,
The first thing we can notice is
that we’re multiplying 𝑖 and 𝑗. The set of 𝑖 is one, and the set
of 𝑗 is one, two. Set 𝑖 is one by one, and set 𝑗 is
one by two. This means that the solution matrix
will be a one by two. Options a and b are two by ones;
they don’t fit.
Now we have to look closely to see
element order. 𝑗 is one and then two. That means the correct matrix will
have the 𝑗 values in the order one, two. The correct matrix is 𝑎 one, one;
𝑎 one, two.