| (1) $k+1 > 2,\ m = 5$ | (2) $k+1 > 2,\ m = 6$ |
| (3) $(2k+1) > 4,\ m = 5$ | (4) $(2k+1) > 4,\ m = 6$ |
\textbf{143-} In proving the inequality $3^{n+1} > n!$ by mathematical induction, after finding a suitable number $m$, the inductive step relation for $k \geq m$ is which of the following?
\begin{tabular}{ll}
(1) $k+1 > 2,\ m = 5$ & (2) $k+1 > 2,\ m = 6$ \\
(3) $(2k+1) > 4,\ m = 5$ & (4) $(2k+1) > 4,\ m = 6$
\end{tabular}
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