$A=\left[\begin{array}{rr} 8 & 7
\\ 2 & 6 \end{array}\right] $ and
$B=\left[\begin{array}{rr} \dfrac{3}{17} & -\dfrac{3}{17}
\\\\\dfrac{1}{17} & \dfrac{4}{17} \end{array}\right]$
**Are $A$ and $B$ inverses?**
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