There are 10000 hectares of cultivated land in a certain place. After 10 years of planning, the grain yield per unit area will increase by 20% and the per capita grain share will increase by 10%. If the annual population growth rate is 1%, how many hectares of cultivated land can be reduced at most every year? (accurate to 1 hectare) We should use the permutation and combination quadratic term theorem to solve the problem

There are 10000 hectares of cultivated land in a certain place. After 10 years of planning, the grain yield per unit area will increase by 20% and the per capita grain share will increase by 10%. If the annual population growth rate is 1%, how many hectares of cultivated land can be reduced at most every year? (accurate to 1 hectare) We should use the permutation and combination quadratic term theorem to solve the problem

Ten years later, the area of cultivated land is x times that of the present
The 10th power of X × 1.22/1.01 is 1.1
The solution is x = 0.996
On average, it can reduce at most 10000 × (1-0.996) / 10 = 4 hectares per year
If you don't understand, you can set more than one number and eliminate it eventually