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fine-the-solution-of-the-differential-equation-y-2-9y-9sec-2-3x-0-lt-x-lt-pi-2-




Question Number 133400 by Engr_Jidda last updated on 21/Feb/21
fine the solution of the differential  equation y^2 +9y=9sec^2 3x, 0<x<(π/2)
$${fine}\:{the}\:{solution}\:{of}\:{the}\:{differential} \\ $$$${equation}\:{y}^{\mathrm{2}} +\mathrm{9}{y}=\mathrm{9}{sec}^{\mathrm{2}} \mathrm{3}{x},\:\mathrm{0}<{x}<\frac{\pi}{\mathrm{2}} \\ $$

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