14) Evaluate the determinants: (i) |A| and (ii) |B| \text { (i) } A=\left(\begin{array}{ll} 1 & 2 \\ 1 & 6 \end{array}\right) \text {; } B=\left(\begin{array}{ll} 1 & -1 \\ 2 & -4 \end{array}\right)

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