Problem 2-4 1.Test the following for exactness and solve: a. 220xydyyxdxb. cossinxxeydxeydyc. 0axby dxbxay dyd. 22222332428044yxyxdxdyxyxyx y2.Solve: DE: 232213120xy dxxyy dyIC: 13y3.Derive the following solution of the initial-value problem (40): 000,,0xyxyMx ydxNx y dy4.Explain why a differential equation that is not exact cannot be solved by integrating both sides as
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