In: Advanced Math
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1) Given a differential equation (1−2x2−2y)dy−(4x3+4xy)dx = 0. Is it an exact equation? Justify your answer. Solve the equation.
2) Given a differential equation (y3 − y2 sinx − x)dx + (3xy2 + 2y cos x)dy = 0. Is it an exact equation? Justify your answer. Solve the equation.
3) Solve the linear equation of order one: dy/dx + (1 + 2/x)y = x-2ex
4) Solve the linear equation of order one: xdy/dx − 2y = x4ex^2