It's a question about the Mathematical Economics

5. if the utility function ot an individual takes the form or = um, x2J=IX1+ ago; + 3)} where U is total utility, and x1 and x2 are the quanties of two commodities consumed: (0) Find the marginal-utilityr function of each of the two commodities. (:5) Find the value of the marginal utility of the first commodity when 3 units of each commodity are consumed. 4. p184 Exercise 8.1/Q1, Q6 1. Find the differential dy, given: (a}r=x(x3+3i (b)r=(xB)UK+5) tc)1-'= " x3+1