3. a. Sketch the direction field for the system below. x ‘ = x y ‘ = y b. What happens to…

3.          a.    Sketch the direction field for the system below.

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x' = x y' = y

b.          What happens to solutions of this system?

 

c.           Find a formula for the solutions of this system.

4.          Write the second-order differential equation y” = y as a system of differential equations.