Question

If A = [ 2 -3 4 ]
Find :
(i) 5A
(ii) (-4)A
(iii) -A

Answer 1

Step-by-step explanation:

Question :

If A = $\left[\begin{array}{ccc}2&-3&4\end{array}\right]$, find i) 5A ii) (-4)A iii) -A

Solution :

(i) 5A :-

$\rightarrow \left5[\begin{array}{ccc}2&-3&4\end{array}\right]$

$\rightarrow \left[\begin{array}{ccc}10&-15&20\end{array}\right]$

(ii) (-4)A :-

$\rightarrow \left-4[\begin{array}{ccc}2&-3&4\end{array}\right]$

$\rightarrow \left[\begin{array}{ccc}-8&12&-16\end{array}\right]$

(iii) -A :-

$\rightarrow \left-[\begin{array}{ccc}2&-3&4\end{array}\right]$

$\rightarrow \left[\begin{array}{ccc}-2&3&-4\end{array}\right]$

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