for the equation (D³+D²)y=4,find the solution whose graph has a point of inflection with a horizontal tangent at the origin
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the layer of the earth's atmosphere which contains a high concentration of ions and free electrons and is able to reflect radio waves. It lies above the mesosphere and extends from about 80 to 1,000 km above the earth's surface.
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stfdubfjng dijftijfui dyhtihrihg. tihdifbhto fjbfi
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