Practice problem
Which is larger? AB(18)−1(19)−1\begin{array}{c|c} \text{A}&\text{B}\\ \hline \left(\frac18\right)^{-1}&\left(\frac19\right)^{-1} \end{array}A(81)−1B(91)−1
A is larger.
B is larger.
A and B are equal.
Not enough information is given.
Type a concept, like “slope” or “photosynthesis”.
