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Question
Which formula expresses distributive over matrix addition?
Options
\[k(A+B)=kA+B\]
\[k(A+B)=kA+kB\]
\[k(A+B)=A+kB\]
\[k(A+B)=(kA)(kB)\]
MCQ
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Solution
The scalar \[k\] multiplies every entry in both \[A\] and \[B\]. Thus, scalar multiplication distributes over matrix addition as \[k(A+B)=kA+kB\].
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