Exercise 3 2 dy Solve the differential equation + 2 + 5 = 0 given that y=1, = 0 2 dt when t=0 #Answer: − + − Exercise 4 d 2 y t ' Solve the differential equation + 4 =y 15e , given that y ( ) 50 = , y ( ) 0 = 2 − dt 2 #Answer : + − 79