1. Find a particular solution of a linear homogeneous differential equation.
1.18 y- y + y- y = 0, y (0) = 0, y (0) = 1, y (0) = 0

2. Solve the system of differential equations in two ways: a) information to higher order differential equations; b) using a characteristic equation.
2.18 x '= x + 2y, y' = 4x + 3y

3. Solve the differential equation by variation of arbitrary constants.
3.18 y + y = 1 / sinx

4. Solve the following problems.
4.18 Write the equation of the curve has the property segment of the tangent to the curve, concluded between the two axes, divided in half at the point of contact.

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