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(x^2+6*x+8)*log(1/4,3+sin(pi*x*1/6)^2)>1 desigualdades

En la desigualdad la incógnita

Solución

Ha introducido [src]
/ 2          \    / 1        2/pi*x\\    
\x  + 6*x + 8/*log|---- + sin |----|| > 1
                  |/43\       \ 6  /|    
                  ||--|             |    
                  \\10/             /    
$$\left(\left(x^{2} + 6 x\right) + 8\right) \log{\left(\sin^{2}{\left(\frac{\pi x}{6} \right)} + \frac{1}{\frac{43}{10}} \right)} > 1$$
(x^2 + 6*x + 8)*log(sin((pi*x)/6)^2 + 1/(43/10)) > 1
Solución detallada
Se da la desigualdad:
$$\left(\left(x^{2} + 6 x\right) + 8\right) \log{\left(\sin^{2}{\left(\frac{\pi x}{6} \right)} + \frac{1}{\frac{43}{10}} \right)} > 1$$
Para resolver esta desigualdad primero hay que resolver la ecuación correspondiente:
$$\left(\left(x^{2} + 6 x\right) + 8\right) \log{\left(\sin^{2}{\left(\frac{\pi x}{6} \right)} + \frac{1}{\frac{43}{10}} \right)} = 1$$
Resolvemos:
$$x_{1} = 44.0399563314599$$
$$x_{2} = 62.0394684047451$$
$$x_{3} = 86.0392189626225$$
$$x_{4} = -87.960752990268$$
$$x_{5} = 69.9606414288391$$
$$x_{6} = 51.960317360709$$
$$x_{7} = -38.0407780688253$$
$$x_{8} = 20.0432088314978$$
$$x_{9} = -15.947398168905$$
$$x_{10} = -26.0432088314978$$
$$x_{11} = 2.13297331429678$$
$$x_{12} = -93.960792963045$$
$$x_{13} = -57.960317360709$$
$$x_{14} = -86.0392616788506$$
$$x_{15} = 57.9604576088967$$
$$x_{16} = 39.9598399598453$$
$$x_{17} = 99.9608529628847$$
$$x_{18} = -39.9594087512125$$
$$x_{19} = -81.9607035584175$$
$$x_{20} = 81.960752990268$$
$$x_{21} = -44.0402775920566$$
$$x_{22} = 80.0392616788506$$
$$x_{23} = 75.9607035584175$$
$$x_{24} = -99.9608257449484$$
$$x_{25} = -33.9587022825868$$
$$x_{26} = -50.0399563314599$$
$$x_{27} = -74.0393818699341$$
$$x_{28} = -45.9598399598453$$
$$x_{29} = 26.0416209775957$$
$$x_{30} = -68.0394684047451$$
$$x_{31} = -32.0416209775957$$
$$x_{32} = -75.9606414288391$$
$$x_{33} = 50.0397378990539$$
$$x_{34} = 3.91137210005719$$
$$x_{35} = -51.9601223774976$$
$$x_{36} = -98.0391840809125$$
$$x_{37} = 14.0467731248464$$
$$x_{38} = 92.0391840809125$$
$$x_{39} = 27.9587022825868$$
$$x_{40} = 56.0395826650111$$
$$x_{41} = 33.9594087512125$$
$$x_{42} = 32.0407780688253$$
$$x_{43} = 63.9605618478227$$
$$x_{44} = -92.0392189626225$$
$$x_{45} = 98.0391552285943$$
$$x_{46} = -27.957424098254$$
$$x_{47} = -80.0393147646128$$
$$x_{48} = 38.0402775920566$$
$$x_{49} = -14.0577682683149$$
$$x_{50} = 74.0393147646128$$
$$x_{51} = 68.0393818699341$$
$$x_{52} = -69.9605618478227$$
$$x_{53} = 87.960792963045$$
$$x_{54} = -9.91137210005719$$
$$x_{55} = -62.0395826650111$$
$$x_{56} = 8.0577682683149$$
$$x_{57} = -21.954735126445$$
$$x_{58} = 45.9601223774976$$
$$x_{59} = 15.954735126445$$
$$x_{60} = -8.13297331429678$$
$$x_{61} = 93.9608257449484$$
$$x_{62} = -56.0397378990539$$
$$x_{63} = 9.94739816890502$$
$$x_{64} = -20.0467731248464$$
$$x_{65} = -63.9604576088967$$
$$x_{66} = 21.957424098254$$
$$x_{1} = 44.0399563314599$$
$$x_{2} = 62.0394684047451$$
$$x_{3} = 86.0392189626225$$
$$x_{4} = -87.960752990268$$
$$x_{5} = 69.9606414288391$$
$$x_{6} = 51.960317360709$$
$$x_{7} = -38.0407780688253$$
$$x_{8} = 20.0432088314978$$
$$x_{9} = -15.947398168905$$
$$x_{10} = -26.0432088314978$$
$$x_{11} = 2.13297331429678$$
$$x_{12} = -93.960792963045$$
$$x_{13} = -57.960317360709$$
$$x_{14} = -86.0392616788506$$
$$x_{15} = 57.9604576088967$$
$$x_{16} = 39.9598399598453$$
$$x_{17} = 99.9608529628847$$
$$x_{18} = -39.9594087512125$$
$$x_{19} = -81.9607035584175$$
$$x_{20} = 81.960752990268$$
$$x_{21} = -44.0402775920566$$
$$x_{22} = 80.0392616788506$$
$$x_{23} = 75.9607035584175$$
$$x_{24} = -99.9608257449484$$
$$x_{25} = -33.9587022825868$$
$$x_{26} = -50.0399563314599$$
$$x_{27} = -74.0393818699341$$
$$x_{28} = -45.9598399598453$$
$$x_{29} = 26.0416209775957$$
$$x_{30} = -68.0394684047451$$
$$x_{31} = -32.0416209775957$$
$$x_{32} = -75.9606414288391$$
$$x_{33} = 50.0397378990539$$
$$x_{34} = 3.91137210005719$$
$$x_{35} = -51.9601223774976$$
$$x_{36} = -98.0391840809125$$
$$x_{37} = 14.0467731248464$$
$$x_{38} = 92.0391840809125$$
$$x_{39} = 27.9587022825868$$
$$x_{40} = 56.0395826650111$$
$$x_{41} = 33.9594087512125$$
$$x_{42} = 32.0407780688253$$
$$x_{43} = 63.9605618478227$$
$$x_{44} = -92.0392189626225$$
$$x_{45} = 98.0391552285943$$
$$x_{46} = -27.957424098254$$
$$x_{47} = -80.0393147646128$$
$$x_{48} = 38.0402775920566$$
$$x_{49} = -14.0577682683149$$
$$x_{50} = 74.0393147646128$$
$$x_{51} = 68.0393818699341$$
$$x_{52} = -69.9605618478227$$
$$x_{53} = 87.960792963045$$
$$x_{54} = -9.91137210005719$$
$$x_{55} = -62.0395826650111$$
$$x_{56} = 8.0577682683149$$
$$x_{57} = -21.954735126445$$
$$x_{58} = 45.9601223774976$$
$$x_{59} = 15.954735126445$$
$$x_{60} = -8.13297331429678$$
$$x_{61} = 93.9608257449484$$
$$x_{62} = -56.0397378990539$$
$$x_{63} = 9.94739816890502$$
$$x_{64} = -20.0467731248464$$
$$x_{65} = -63.9604576088967$$
$$x_{66} = 21.957424098254$$
Las raíces dadas
$$x_{24} = -99.9608257449484$$
$$x_{36} = -98.0391840809125$$
$$x_{12} = -93.960792963045$$
$$x_{44} = -92.0392189626225$$
$$x_{4} = -87.960752990268$$
$$x_{14} = -86.0392616788506$$
$$x_{19} = -81.9607035584175$$
$$x_{47} = -80.0393147646128$$
$$x_{32} = -75.9606414288391$$
$$x_{27} = -74.0393818699341$$
$$x_{52} = -69.9605618478227$$
$$x_{30} = -68.0394684047451$$
$$x_{65} = -63.9604576088967$$
$$x_{55} = -62.0395826650111$$
$$x_{13} = -57.960317360709$$
$$x_{62} = -56.0397378990539$$
$$x_{35} = -51.9601223774976$$
$$x_{26} = -50.0399563314599$$
$$x_{28} = -45.9598399598453$$
$$x_{21} = -44.0402775920566$$
$$x_{18} = -39.9594087512125$$
$$x_{7} = -38.0407780688253$$
$$x_{25} = -33.9587022825868$$
$$x_{31} = -32.0416209775957$$
$$x_{46} = -27.957424098254$$
$$x_{10} = -26.0432088314978$$
$$x_{57} = -21.954735126445$$
$$x_{64} = -20.0467731248464$$
$$x_{9} = -15.947398168905$$
$$x_{49} = -14.0577682683149$$
$$x_{54} = -9.91137210005719$$
$$x_{60} = -8.13297331429678$$
$$x_{11} = 2.13297331429678$$
$$x_{34} = 3.91137210005719$$
$$x_{56} = 8.0577682683149$$
$$x_{63} = 9.94739816890502$$
$$x_{37} = 14.0467731248464$$
$$x_{59} = 15.954735126445$$
$$x_{8} = 20.0432088314978$$
$$x_{66} = 21.957424098254$$
$$x_{29} = 26.0416209775957$$
$$x_{39} = 27.9587022825868$$
$$x_{42} = 32.0407780688253$$
$$x_{41} = 33.9594087512125$$
$$x_{48} = 38.0402775920566$$
$$x_{16} = 39.9598399598453$$
$$x_{1} = 44.0399563314599$$
$$x_{58} = 45.9601223774976$$
$$x_{33} = 50.0397378990539$$
$$x_{6} = 51.960317360709$$
$$x_{40} = 56.0395826650111$$
$$x_{15} = 57.9604576088967$$
$$x_{2} = 62.0394684047451$$
$$x_{43} = 63.9605618478227$$
$$x_{51} = 68.0393818699341$$
$$x_{5} = 69.9606414288391$$
$$x_{50} = 74.0393147646128$$
$$x_{23} = 75.9607035584175$$
$$x_{22} = 80.0392616788506$$
$$x_{20} = 81.960752990268$$
$$x_{3} = 86.0392189626225$$
$$x_{53} = 87.960792963045$$
$$x_{38} = 92.0391840809125$$
$$x_{61} = 93.9608257449484$$
$$x_{45} = 98.0391552285943$$
$$x_{17} = 99.9608529628847$$
son puntos de cambio del signo de desigualdad en las soluciones.
Primero definámonos con el signo hasta el punto extremo izquierdo:
$$x_{0} < x_{24}$$
Consideremos, por ejemplo, el punto
$$x_{0} = x_{24} - \frac{1}{10}$$
=
$$-99.9608257449484 + - \frac{1}{10}$$
=
$$-100.060825744948$$
lo sustituimos en la expresión
$$\left(\left(x^{2} + 6 x\right) + 8\right) \log{\left(\sin^{2}{\left(\frac{\pi x}{6} \right)} + \frac{1}{\frac{43}{10}} \right)} > 1$$
$$\left(8 + \left(\left(-100.060825744948\right) 6 + \left(-100.060825744948\right)^{2}\right)\right) \log{\left(\frac{1}{\frac{43}{10}} + \sin^{2}{\left(\frac{\left(-100.060825744948\right) \pi}{6} \right)} \right)} > 1$$
                    /10      2                      \    
9419.80389429124*log|-- + sin (0.676804290824734*pi)| > 1
                    \43                             /    

Entonces
$$x < -99.9608257449484$$
no se cumple
significa que una de las soluciones de nuestra ecuación será con:
$$x > -99.9608257449484 \wedge x < -98.0391840809125$$
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       x24      x36      x12      x44      x4      x14      x19      x47      x32      x27      x52      x30      x65      x55      x13      x62      x35      x26      x28      x21      x18      x7      x25      x31      x46      x10      x57      x64      x9      x49      x54      x60      x11      x34      x56      x63      x37      x59      x8      x66      x29      x39      x42      x41      x48      x16      x1      x58      x33      x6      x40      x15      x2      x43      x51      x5      x50      x23      x22      x20      x3      x53      x38      x61      x45      x17

Recibiremos otras soluciones de la desigualdad pasando al polo siguiente etc.
etc.
Respuesta:
$$x > -99.9608257449484 \wedge x < -98.0391840809125$$
$$x > -93.960792963045 \wedge x < -92.0392189626225$$
$$x > -87.960752990268 \wedge x < -86.0392616788506$$
$$x > -81.9607035584175 \wedge x < -80.0393147646128$$
$$x > -75.9606414288391 \wedge x < -74.0393818699341$$
$$x > -69.9605618478227 \wedge x < -68.0394684047451$$
$$x > -63.9604576088967 \wedge x < -62.0395826650111$$
$$x > -57.960317360709 \wedge x < -56.0397378990539$$
$$x > -51.9601223774976 \wedge x < -50.0399563314599$$
$$x > -45.9598399598453 \wedge x < -44.0402775920566$$
$$x > -39.9594087512125 \wedge x < -38.0407780688253$$
$$x > -33.9587022825868 \wedge x < -32.0416209775957$$
$$x > -27.957424098254 \wedge x < -26.0432088314978$$
$$x > -21.954735126445 \wedge x < -20.0467731248464$$
$$x > -15.947398168905 \wedge x < -14.0577682683149$$
$$x > -9.91137210005719 \wedge x < -8.13297331429678$$
$$x > 2.13297331429678 \wedge x < 3.91137210005719$$
$$x > 8.0577682683149 \wedge x < 9.94739816890502$$
$$x > 14.0467731248464 \wedge x < 15.954735126445$$
$$x > 20.0432088314978 \wedge x < 21.957424098254$$
$$x > 26.0416209775957 \wedge x < 27.9587022825868$$
$$x > 32.0407780688253 \wedge x < 33.9594087512125$$
$$x > 38.0402775920566 \wedge x < 39.9598399598453$$
$$x > 44.0399563314599 \wedge x < 45.9601223774976$$
$$x > 50.0397378990539 \wedge x < 51.960317360709$$
$$x > 56.0395826650111 \wedge x < 57.9604576088967$$
$$x > 62.0394684047451 \wedge x < 63.9605618478227$$
$$x > 68.0393818699341 \wedge x < 69.9606414288391$$
$$x > 74.0393147646128 \wedge x < 75.9607035584175$$
$$x > 80.0392616788506 \wedge x < 81.960752990268$$
$$x > 86.0392189626225 \wedge x < 87.960792963045$$
$$x > 92.0391840809125 \wedge x < 93.9608257449484$$
$$x > 98.0391552285943 \wedge x < 99.9608529628847$$
Solución de la desigualdad en el gráfico