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• lab{11.1.6a} Find the general solution of the differential equation [math](D^2+\frac14)y = 0[/math].
• lab{11.1.6b} Find the particular solution of the differential equation in \ref{ex11.1.6a} whose graph passes through the point [math]\left(0, \frac{\sqrt2}2\right)[/math] with a slope of [math]-\frac{\sqrt2}4[/math].
• Sketch the graph of the function in \ref{ex11.1.6b}.