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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 :          +                             −                       
                                                                                                      
                                                                                       
                                                                                                      

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