Two Stage Amplifier Circuit Analysis Q
It is not a voltage divider. For AC signals we assume the capacitors to be a short, both 10uF caps are large enough for this so assume they're shorts.

So the AC input signal is directly on the base, do the 2 base resistors then still matter? Nope

Same for the 5.6k emitter resistor, it is shorted by 10 uF. So for AC this is a common emitter circuit. Only the 6.8k collector resistor matters for the gain.

The other three resistors are only for setting the DC biasing point.