Question

If A is a matrix of order 3 x 4, then each row of A has ____________.

Options

• 7 elements

• 12 elements

• 4 elements

• 3 elements

Answer 1

If A is a matrix of order 3 x 4, then each row of A has 4 elements.

Explanation:

`"A" = [("a"_11, "a"_12, "a"_13, "a"_14),("a"_21, "a"_22, "a"_23, "a"_24),("a"_31, "a"_32, "a"_33, "a"_34)]_(3 xx 4)` ,therefore matrix A_m has 4 elements in each row.