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

2. Solve the following tasks:
2.6. Calculate the moment of inertia about the origin of a square outline with sides x = ± a, y = ± a. square density assumed to be constant.

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