Given the total utility function (Tu)=150x+40x²-x³,then drive marginal utility function and find the value of x at which total utility is maximum

 

1. Given the utility function u =150x +40x2-x3 derive average and marginal utility functions, Find the value of X at which total utility is maximum, and the value of X at which average utility is maximum?

Given the utility function U=150X+40X2-X3, derive average and marginal utility functions, Find the value of X at which total utility is maximum, and the value of X at which average utility is maximum?

Total utility is maximized when

a. marginal utility is positive

b. marginal utility is negative

c. marginal utility is zero