ИДЗ 14.2 – Вариант 15. Решения Рябушко А.П.

1. Show that this expression is a total differential of the function u (x, y). Find u (x, y) function
1.15. (1 + cos (xy)) ydx + (1 + cos (xy)) xdy

2. Solve the following tasks:
2.15. Find a job force F = xi + (x + y) j at the point of mass m moving on the arc of the ellipse x2 / 16 + y2 / 9 = 1.

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