A ready solution to the problem. The sorcerer of Arutyunov. Task number 398.

391 - 400. Compute the given curvilinear integrals.

398. Compute the curvilinear integral
 
Along the segment L = AB, the line from the point A (1; 2) to the point B (2; 4). Draw a drawing.

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Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)