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???????I need solution steps for this differential equation 8. Find the general solution of the differential equation ( y^{prime prime}+9 y=9 sec ^{2}(3 x) ).
???????I need solution steps for this differential equation 8. Find the general solution of the differential equation \( y^{\prime \prime}+9 y=9 \sec ^{2}(3 x) \). \[ \text { Answer: } y=c_{1} \cos (3 x)+c_{2} \sin (3 x)+\sin (3 x) \ln |\sec (3 x)+\tan (3 x)|- 2 answers
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Research Methods Statistics and Applications
Authors: Kathrynn A. Adams, Eva Marie K. Lawrence
1st edition
1452220182, 978-1452220185
