Given A - begin bmatrix 3 - 111-2 - 1bmatrix - text and - B - beginbmatrix 48-3 12 -1lend bmatrix Find sum of all elements in the matrix A - B -21 -A- 1

The correct option is A 1A+B=[ 3 amp; 1; nbsp; 2 amp; 1 ]+[ nbsp;4 amp; 3; nbsp; 2 amp; 1 nbsp; ]=[ 7 amp; 2; nbsp; 0 amp;0 ...

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Standard X

Mathematics

Addition and Subtraction of a Matrix

Given A = beg...

Question

Given $A = [\begin{matrix} 3 & 1 - 2 & 1 \end{matrix}] and B = [\begin{matrix} 4 & - 3 2 & - 1 \end{matrix}]$

Find sum of all elements in the matrix A+B-2l.

1

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Solution

The correct option is A 1
$A + B = [\begin{matrix} 3 & 1 - 2 & 1 \end{matrix}] + [\begin{matrix} 4 & - 3 2 & - 1 \end{matrix}] = [\begin{matrix} 7 & - 2 0 & 0 \end{matrix}]$

$2 l = [\begin{matrix} 2 & 0 0 & 2 \end{matrix}]$

$A + B - 2 l = [\begin{matrix} 7 & - 2 0 & 0 \end{matrix}] - [\begin{matrix} 2 & 0 0 & 2 \end{matrix}] = [\begin{matrix} 5 & - 2 0 & - 2 \end{matrix}]$
Sum of all elements in A+B-2I
= 5 + 0 + (-2) + (-2) = 5 - 4 = 1

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Given A=[31−21] and B=[4−32−1] Find sum of all elements in the matrix A+B-2l.1

The correct option is A 1A+B=[31−21]+[4−32−1]=[7−200] 2l=[2002] A+B−2l=[7−200]−[2002]=[5−20−2] Sum of all elements in A+B-2I = 5 + 0 + (-2) + (-2) = 5 - 4 = 1

Given $A = [\begin{matrix} 3 & 1 - 2 & 1 \end{matrix}] and B = [\begin{matrix} 4 & - 3 2 & - 1 \end{matrix}]$

Find sum of all elements in the matrix A+B-2l.

1