Algebra Archive: Questions from January 03, 2023
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If \( A=\left[\begin{array}{rr}8 & -6 \\ -3 & -8\end{array}\right] \) and \( B=\left[\begin{array}{rr}4 & 1 \\ -5 & 3\end{array}\right] \), compute \( A B \) and \( B A \), if possible.2 answers -
\( a_{n}=\frac{1}{4}\left[\int_{0}^{4} x \cos \left(\frac{n \pi x}{4}\right) d x\right]+\frac{1}{4}\left[\int_{4}^{3}(8-x) \cos \left(\frac{n \pi x}{4}\right) d x\right] \)1 answer