[ Numerical inequalities. Comparing numbers.]

What is greater: $7^{92}$ or $8^{91}$ ?
According to Bernoulli's inequality (see problem $\underline{\text { 30899 }}$) $\left({ }^{8} / 7\right)^{91}>1+{ }^{91} / 7=14>7$, therefore, $8^{91}>7^{92}$.

## Answer

$8^{91}$.