If A - 1 2- -2 9 - then -2 A -A- - 1 2- -2 2 -B- - -2 -4- 4 -18 -C- - -2 4- 4 -18 -D- - -2 -4- -4 -18 -

The correct option is B A=[ 1 amp;2; 2 amp;9 ] 2A= 2[ 1 amp;2; 2 amp;9 ] =[ 2 amp; 4; 4 amp; 18 ] ...

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Byju's Answer

Standard X

Mathematics

Scalar Multiplication of a Matrix

If A =[[ 1 2;...

Question

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

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Solution

The correct option is A

$A = [\begin{matrix} 1 & 2 - 2 & 9 \end{matrix}]$

$- 2 A = - 2 [\begin{matrix} 1 & 2 - 2 & 9 \end{matrix}]$

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

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IfA=[12−29], then -2A=_______________

The correct option is A A=[12−29] −2A=−2[12−29] =[−2−44−18]

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

The correct option is A

$A = [\begin{matrix} 1 & 2 - 2 & 9 \end{matrix}]$

$- 2 A = - 2 [\begin{matrix} 1 & 2 - 2 & 9 \end{matrix}]$

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