Question:medium
If \(
\begin{pmatrix}
-1 & 2
3 & -4
-5 & 6
\end{pmatrix}
\begin{pmatrix}
7
8
\end{pmatrix}
=
\begin{pmatrix}
\alpha
\beta
13
\end{pmatrix}
\), then the value of \( \alpha + \beta \) is equal to
If \(
\begin{pmatrix}
-1 & 2
3 & -4
-5 & 6
\end{pmatrix}
\begin{pmatrix}
7
8
\end{pmatrix}
=
\begin{pmatrix}
\alpha
\beta
13
\end{pmatrix}
\), then the value of \( \alpha + \beta \) is equal to
Show Hint
Always multiply row-wise for matrices and verify with given result if possible.
Updated On: Apr 21, 2026
- \(-18 \)
- \(18 \)
- \(21 \)
- \(-21 \)
- \(-2 \)
Show Solution
The Correct Option is
Solution and Explanation
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