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CBSE Class 12 · 2009 · MatricesVery Short Answer

If matrix

A = [123]

, write

A A^{'}

, where

A^{'}

is the transpose of matrix

A

.

Answer: $[14]$

Solution

A

is

1 \times 3

and

A^{'}

is

3 \times 1

, so

A A^{'}

is

1 \times 1

.

A A^{'} = [123] 123 = [1^{2} + 2^{2} + 3^{2}] = [14] .

A A^{'} = [14]

CBSE Class 12 Board · 2009 · Subjective

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