Question
If $A =\left[\begin{array}{cc}3 & -2 \\ -1 & 4\end{array}\right], B =\left[\begin{array}{l}6 \\ 1\end{array}\right], C =\left[\begin{array}{r}-4 \\ 5\end{array}\right]$ and $D =\left[\begin{array}{l}2 \\ 2\end{array}\right]$, find $AB +2 C -4 D$.

Answer

Self

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A page from the saving bank account of Priyanka is given below :
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Balance
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3/4/2006 B/F - - 4,000·00
5/4/2006 By Cash - 2,000·00 6,000·00
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10/9/2006 By cash - 2,000·00 8,000·00
19/9/2006 To cheque 1,000·00 - 7,000·00

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