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3 1 3 2 3 3 18 1 18 3 1 t C t C t C C y t =∫u t dt= t − − + = + − + Comment: Notice the above solution is not in the form of y = C1 y1 + C2 y2. There is nothing wrong with this, because this equation is not homogeneous. The general solution of a nonhomogeneous linear equation has a slightly different form. Convert PDF to Word, Excel, PPT, JPG, PNG, HTML, AutoCAD with free PDF converter online. Convert to PDF, compress and merge PDF files without limits. The Acrobat online PDF compressor balances an optimized file size against the expected quality of images, fonts, and other file content. Just drag and drop a PDF into the tool above and let Acrobat reduce the file size without compromising quality. Dark: Season 1 (Recap) Episodes Dark. Privacyscan 1 9. Release year: 2017. A missing child sets four families on a frantic hunt for answers as they unearth a mind-bending mystery that spans three generations. In 2019, a local boy's disappearance stokes fear in the residents of Winden, a small German town with a strange and tragic history.