Question: (4) show complete solution NEED ASAP Determine whether the following differential equations are exact. 1. 2xy dx + (1 + x2) dy = 0 2.

(4) show complete solution

NEED ASAP

Determine whether the following differential equations are exact. 1. 2xy dx + (1 + x2) dy = 0 2. y dx - x dy = 0 3. (x + sin y) dx + (x cos y - 2y) = 0

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