C(x)= 600x + (180000/x) + 800
calculate the instantaneous rate of change of the income when 100 units are sold?
dC/dx = 600 - 180000/x^2
plug in x=100
I assume C(x) is the income function
calculate the instantaneous rate of change of the income when 100 units are sold?
plug in x=100
I assume C(x) is the income function