1. Show that this expression is a total differential of the function u (x, y). Find u (x, y) function
1.29. (1 / (y-1) -y / (x-1) 2-2) dx + (1 / (x-1) -x / (y-1) 2 + 2y) dy

2. Solve the following tasks:
2.29. Calculate the work of the force F = (x - y) i + 2yj when moving material point of origin to the point (1, -3) on the parabola y = -3x2.

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