U(X, Y) = X3 - 3XY2 23. U(X, Y) = X2 - Y2 + 5X + Y - 2 2+XYX 25. U...

BAI TAP CHO 16 UNIT 12 CO DAP AN

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Đáp án tham khảo

22. u(x, y) = x

³

- 3xy

²

23. u(x, y) = x

²

- y

²

+ 5x + y -

₂

₂

+xyx 25. u(x, y) =

₂

₂