There are 20 plants that produce 60 kg fruits each in a year. With the raise of the number of plants the production decreases. This decrease is 2kg in a year for each plant (over the number 20). for which value of x, this fruit production takes the biggest value?
Firstly I said that y=(20+x)60-2x is the tree production annual. How should I proceed?
Calculate the values for $x=0,1,2,3,4,5,6,7,8,9,10$. Which value gives the biggest crop?
I think each tree loses 2x, so the total crop will be $(20+x)(60-2x)$ rather than $(20+x)60-2x$.