(a) For what values of r does the function y erx satisfy the differential equation 2y0 1 y9 2 y 0? (b) If r1 and r2 are the values of r that you found in part (a), show that every member of the family of functions y aer1 x 1 ber2 x is also a solution

Chapter 7 Mood Disorders and Suicide Understanding and Defining Mood Disorders Mood disorders “Depressive disorders” “Affective disorders” “Depressive neuroses” Gross deviations in mood Depression Mania An Overview of Depression and Mania Major depressive episode Extreme depression 2 weeks Cognitive symptoms Physical dysfunction Anhedonia Duration—4 to 9 months, untreated Manic episode Exaggerated elation, joy, euphoria 1 week, or less Cognitive symptoms Duration—3 to 4 months, untreated Hypomanic episode 1Structure of Mood Disorders Unipolar disorders Depression or mania alone Typically depression Bipolar disorders Depression a