DHS 14.2 - Option 7. Decisions Ryabushko AP

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1. Show that this expression is a total differential of the function u (x, y). Find u (x, y) function
1.7. (Ex + y - cosx) dx + (ex + y + siny) dy

2. Solve the following tasks:
2.7. Calculate the arc length of the curve x = 2 - t4 / 4, y = t6 / 6, limited points of its intersection with the coordinate axes.

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