1. Show that this expression is a total differential of the function u (x, y). Find u (x, y) function
1.24. ex - y (1 + x + y) dx + ex - y (1 - x - y) dy
2. Solve the following tasks:
2.24. Calculate the work of the force F = (x - y) i + xj when moving material point along the contour of a square formed by lines x = ± 1, y = ± 1.
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