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Scalar Multiplication of a Matrix

If A =⋁ begin...

Question

If A = $[\begin{matrix} 1 & 2 - 2 & 9 \end{matrix}]$ , then -2A=___.

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Solution

-2A = $[\begin{matrix} - 2 & - 4 4 & - 18 \end{matrix}]$

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2 A - [\begin{matrix} 1 & 2 7 & 4 \end{matrix}] = [\begin{matrix} 3 & 0 0 & - 2 \end{matrix}],

A

A = [\begin{matrix} 2 & 4 3 & 2 \end{matrix}], B = [\begin{matrix} 1 & 3 - 2 & 5 \end{matrix}]

, then find the value of

2 A - 3 B

.

Q. The rank of the matrix

⎡ ⎢ ⎣ \begin{matrix} 3 & - 1 & 2 - 3 & 1 & 2 - 6 & 2 & 4 \end{matrix} ⎤ ⎥ ⎦

2 A + B = [\begin{matrix} 6 & 4 6 & - 11 \end{matrix}]

A - B = [\begin{matrix} 0 & 2 6 & 2 \end{matrix}]

A =

A = [\begin{matrix} 2 & - 3 3 & 2 \end{matrix}]

B = [\begin{matrix} 3 & - 2 2 & 3 \end{matrix}],

2 A - B =

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Scalar Multiplication of a Matrix

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