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प्रश्न
Let A be a matrix of order 3 × 4. If R1 denotes the first row of A and C2 denotes its second column, then determine the orders of matrices R1 and C2
उत्तर
A is a matrix of order 3 × 4
⇒ A has 3 rows and 4 columns
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)]`
Now, Row 1 i.e. R1 = `[("a"_11,"a"_12,"a"_13,"a"_14)]`, it has 4 columns
So, order of R1 is 1 × 4
Column 2 i.e. C2 = `[("a"_12),("a"_22),("a"_32)]`, it has 1 column and 3 rows
So, order of C2 is 3 × 1.
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