The total output value of industry and agriculture in the village is 2700 yuan a year, which should be 27 million yuan, right?

1y(x)=(2700+60x)/( 1000+ax)

Per capita value = gross output value/total population

2 y(x+ 1)-y(x)>0

that is

(2700+60(x+ 1))/( 1000+a(x+ 1))& gt； = (2700+60x)/( 1000+ax)

Finishing:

60000-2700 a & gt； 0

Reason (a∈N)

Therefore, a < = 22.

That is, the annual net increase in population cannot exceed 22.

The net increase of per capita output value in 2+ years is not less than the initial per capita output value.

So 60/a > = 2700/ 1000.

Get an a