10. f(x,y) = In(xy) of of 14. Let f(p,q) =1-p(1+q). = Find and...

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  5. 10. f(x,y) = In(xy) of of 14. Let f(p,q) =1-p(1+q). = Find and...

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10. f(x,y) = In(xy) of of 14. Let f(p,q) =1-p(1+q). = Find and aq Op 18, Let = Ox' of of by , and of 8z 20. Let f(x,y)=(x+y²3.Evaluate = of and of at (x,y) = (1,2). 22. Compute 1/2 of 8y (2,1) and interpret your result. no no 22 f 22 f 0² 2 f 24. Let . Find Ox2 dy2 8x8y and 22 f Oy xx UP2 28 Refer to Exercise 27. Let g(p1,p2) be the number of peo- ple who will take the train when P1 is the price of the bus ride and P2 is the price of the train ride. Would you expect 8p1 ag to be positive or negative? How about 02/20 ag (26. Productivity Labor and Capital The productivity of a coun- try is given by f(x,y) = where x and y are the amount of labor and capital. (a) Compute the marginal productivities of labor and capital when x = 125 and y = 64. (b) Use part (a) to determine the approximate effect on productivity of increasing capital from 64 to 66 units, while keeping labor fixed at 125 units. (c) What would be the approximate effect of decreas- ing labor from 125 to 124 units while keeping capital fixed at 64 units? UPI bus it UP2 than 28 Refer to Exercise 27. Let g(p1,p2) be the number of peo- ple who will take the train when P1 is the price of the bus ride and P2 is the price of the train ride. Would you expect 8g to be positive or negative? How about ag ? 8p1 8p2 no 30. The demand for a certain gas-guzzling car is given by f(P1, P2), where P1 is the price of the car and p2 is the price of gasoline. Explain why of < 0 and of < 0. ap1 8p2 21 Th

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