True or False? Justify your answer with a proof or a counterexample. 119. y = e x cos ( 3 x ) + e x sin ( 2 x ) is a solution to the second-order differential equation y ″ + 2 y ′ + 10 = 0 .
True or False? Justify your answer with a proof or a counterexample. 119. y = e x cos ( 3 x ) + e x sin ( 2 x ) is a solution to the second-order differential equation y ″ + 2 y ′ + 10 = 0 .
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