Test "Differential Equations" (2 hours). 345 p.

Solve these differential equations.

1.7 y′ = 4 + y/x + (y/x)2

2.7 y′ = 2x – y

3.7 y′′ = 4cos2x

4.7 y′′ – 2y′ + 5y = 5x2 – 4x + 2, y(0) = 0, y′(0) = 2

5.7 y′′ − y = shx

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