Question

6) For each of the following utility functions derive directly from the definition not using the formula(s) from class or the tert - the MRS (marginal rate of substitution) of y for r at (2,4) (a) ua(r, y) -z2y/2 (b) ub(x y)-21/2 +y/2 (b) ue(a, y)-14+y/4 (d) ud(x, y)--1/x - 1/y

Please solve it with Definition as the change of x goes to 0 or the change of y goes to 0. Thank you!

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