we know that
"marginal average cost function" means "the derivative of the average cost
function."
The Average Cost function is the total cost of producing some number of units
divided by the very number of units produced
step 1
Find out the Average Cost function
Average cost function=C(x)/x
substitute
step 2
Find the derivative of the function in step 1
therefore
the answer is
-(2000/x^2)+0.1x