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sqrt((x+2)-4*sqrt(x-2))+sqrt(x+7-6*sqrt(x-2))>=1 desigualdades

En la desigualdad la incógnita

Solución

Ha introducido [src]
   _____________________      _____________________     
  /             _______      /             _______      
\/  x + 2 - 4*\/ x - 2   + \/  x + 7 - 6*\/ x - 2   >= 1
$$\sqrt{- 6 \sqrt{x - 2} + \left(x + 7\right)} + \sqrt{- 4 \sqrt{x - 2} + \left(x + 2\right)} \geq 1$$
sqrt(-6*sqrt(x - 2) + x + 7) + sqrt(-4*sqrt(x - 2) + x + 2) >= 1
Solución detallada
Se da la desigualdad:
$$\sqrt{- 6 \sqrt{x - 2} + \left(x + 7\right)} + \sqrt{- 4 \sqrt{x - 2} + \left(x + 2\right)} \geq 1$$
Para resolver esta desigualdad primero hay que resolver la ecuación correspondiente:
$$\sqrt{- 6 \sqrt{x - 2} + \left(x + 7\right)} + \sqrt{- 4 \sqrt{x - 2} + \left(x + 2\right)} = 1$$
Resolvemos:
$$x_{1} = -209.185730465882 - 69.3869132967511 i$$
$$x_{2} = -16.3316209432957 + 25.2384811072174 i$$
$$x_{3} = 2.97429800224351 + 10.5816945161317 i$$
$$x_{4} = 9.60642720282926 - 2.01436290069231 i$$
$$x_{5} = 6.80426490214766 + 1.72764871868375 i$$
$$x_{6} = 3.39083443957248 + 12.9050220965973 i$$
$$x_{7} = 9.41935871894229$$
$$x_{8} = -157.836209650189 - 62.7058591221354 i$$
$$x_{9} = 8.25$$
$$x_{10} = -598.199875646853 + 128.092404329392 i$$
$$x_{11} = -17.1821239898267 + 28.6263470704165 i$$
$$x_{12} = -602.961210517373 + 117.235765419086 i$$
$$x_{13} = -464.751570442102 + 97.1690141907255 i$$
$$x_{14} = 1.85813942443044 - 17.96102403561 i$$
$$x_{15} = -11.703200456428 - 27.4255414085721 i$$
$$x_{16} = 7.23060661206161 - 1.99103861084522 i$$
$$x_{17} = -596.008821403641 + 135.432924067879 i$$
$$x_{18} = 7.76367700154925 + 2.85546175661114 i$$
$$x_{19} = -9.83261157058662 - 26.0573597106802 i$$
$$x_{20} = 0.0889057621612147 - 19.0875236891862 i$$
$$x_{21} = -465.492577721658 + 87.3262017116185 i$$
$$x_{22} = -604.934157360214 + 113.834101906546 i$$
$$x_{23} = 7.50920203463435 + 2.38511851816894 i$$
$$x_{24} = -8.85289417928458 + 20.9387849888536 i$$
$$x_{25} = -15.6712269874307 + 19.2501813678031 i$$
$$x_{26} = -122.512959882748 + 62.1332260804273 i$$
$$x_{27} = -15.8657958924392 + 28.1625848403159 i$$
$$x_{28} = 7.33854043758934 - 2.81069661981164 i$$
$$x_{29} = -464.86074523675 + 93.939436524962 i$$
$$x_{30} = -0.419634792565839 - 12.7472942155552 i$$
$$x_{31} = 8.09757208771761$$
$$x_{32} = -3.45866753605209 - 21.4923203402758 i$$
$$x_{33} = -607.062717462228 + 110.68252768482 i$$
$$x_{34} = -15.3320513491424 + 22.7906906901023 i$$
$$x_{35} = -5.25396678065631 - 22.7562739262181 i$$
$$x_{36} = -18.2536905544404 + 31.784077340187 i$$
$$x_{37} = -7.06908033916105 - 24.0543783710452 i$$
$$x_{38} = 3.79638502210314 + 15.2324038414955 i$$
$$x_{39} = 7.34554899576359$$
$$x_{40} = -17.6943623327888 + 30.2268490547442 i$$
$$x_{41} = 5.87298334620742 + 7.87298334620742 i$$
$$x_{42} = -23.9595998233815 + 23.1929481687112 i$$
$$x_{43} = 10.2068191433355$$
$$x_{44} = -17.2367532909385 + 29.4399675077197 i$$
$$x_{45} = -12.6470126043852 - 28.118562365869 i$$
$$x_{46} = -0.123179693577312 - 13.8907413537161 i$$
$$x_{47} = -79.6744527677435 - 40.5724722990315 i$$
$$x_{48} = -601.174648738531 + 120.78735664152 i$$
$$x_{49} = -4.35400726624713 - 22.1197535740408 i$$
$$x_{50} = -24.887423745308 + 26.6390194257314 i$$
$$x_{51} = -8.90583145320022 - 25.3827892249992 i$$
$$x_{52} = -43.0153722534256 + 35.0346814665705 i$$
$$x_{53} = 8.80293710149006 + 3.72070624957389 i$$
$$x_{54} = 6$$
$$x_{55} = 6.63749646475538 - 0.515313189443995 i$$
$$x_{56} = 10.9672909709961$$
$$x_{57} = -15.7889029954648 + 21.431585840444 i$$
$$x_{58} = -73.8374983000384 - 48.4321838201617 i$$
$$x_{59} = -6.15890411996741 - 23.4013169525299 i$$
$$x_{60} = -31.3073886486869 + 31.2443284997006 i$$
$$x_{61} = 6.17452091729384 - 4.6765271733698 i$$
$$x_{62} = 10.7679491924311$$
$$x_{63} = 10.4252769214024$$
$$x_{64} = -7.98468079041038 - 24.7150053322795 i$$
$$x_{65} = -16.0989958917086 + 20.8268978164982 i$$
$$x_{66} = -16.0148131573779 + 23.4060300922983 i$$
$$x_{67} = -13.9420887749843 + 25.7270721438083 i$$
$$x_{68} = 6.8237448862837 - 1.41865451731764 i$$
$$x_{69} = -69.5261729641969 + 52.9052285159186 i$$
$$x_{70} = 6.00122352608875 + 0.0220373775398462 i$$
$$x_{71} = -597.009614284563 + 131.769748792391 i$$
$$x_{72} = 6.54278373449149$$
$$x_{73} = -611.475714808815 + 105.797248405971 i$$
$$x_{74} = 8.79179606750063$$
$$x_{75} = -2.56746456391166 - 20.8746094911533 i$$
$$x_{76} = -119.826864335618 + 46.3630799400323 i$$
$$x_{77} = 6.35219119231979 - 1.86535239620488 i$$
$$x_{78} = -609.283696673399 + 107.929896555719 i$$
$$x_{79} = -599.586888465186 + 124.421399364341 i$$
$$x_{80} = -0.794675676050093 - 19.6713317824368 i$$
$$x_{81} = -121.422256086859 + 45.5503634176283 i$$
$$x_{82} = 7.87367006223537 + 9.69481100887907 i$$
$$x_{83} = -90.7100876432681 + 59.6326551680948 i$$
$$x_{84} = 9.96887112585073$$
$$x_{85} = -16.7246877670263 + 26.9696594255178 i$$
$$x_{86} = -465.104655113882 + 90.6577909146098 i$$
$$x_{87} = 8.06804976116508 - 2.06339030301275 i$$
$$x_{88} = -122.213962313452 + 54.9523487319941 i$$
$$x_{89} = -51.6039374038479 + 46.3643053708792 i$$
$$x_{90} = -13.5964719266668 - 28.8171828880408 i$$
$$x_{91} = -122.42751394833 + 46.3285609568429 i$$
$$x_{92} = -29.5502504793758 + 28.1901982491997 i$$
$$x_{93} = -10.7650635017165 - 26.738379746536 i$$
$$x_{94} = 0.972504042020286 - 18.5170006729628 i$$
$$x_{95} = -1.67975311440071 - 20.2673402106044 i$$
$$x_{96} = -121.10928710798 + 49.8720700424126 i$$
$$x_{97} = 8.86137660652729 - 2.07433915001509 i$$
Descartamos las soluciones complejas:
$$x_{1} = 9.41935871894229$$
$$x_{2} = 8.25$$
$$x_{3} = 8.09757208771761$$
$$x_{4} = 7.34554899576359$$
$$x_{5} = 10.2068191433355$$
$$x_{6} = 6$$
$$x_{7} = 10.9672909709961$$
$$x_{8} = 10.7679491924311$$
$$x_{9} = 10.4252769214024$$
$$x_{10} = 6.54278373449149$$
$$x_{11} = 8.79179606750063$$
$$x_{12} = 9.96887112585073$$
Las raíces dadas
$$x_{6} = 6$$
$$x_{10} = 6.54278373449149$$
$$x_{4} = 7.34554899576359$$
$$x_{3} = 8.09757208771761$$
$$x_{2} = 8.25$$
$$x_{11} = 8.79179606750063$$
$$x_{1} = 9.41935871894229$$
$$x_{12} = 9.96887112585073$$
$$x_{5} = 10.2068191433355$$
$$x_{9} = 10.4252769214024$$
$$x_{8} = 10.7679491924311$$
$$x_{7} = 10.9672909709961$$
son puntos de cambio del signo de desigualdad en las soluciones.
Primero definámonos con el signo hasta el punto extremo izquierdo:
$$x_{0} \leq x_{6}$$
Consideremos, por ejemplo, el punto
$$x_{0} = x_{6} - \frac{1}{10}$$
=
$$- \frac{1}{10} + 6$$
=
$$5.9$$
lo sustituimos en la expresión
$$\sqrt{- 6 \sqrt{x - 2} + \left(x + 7\right)} + \sqrt{- 4 \sqrt{x - 2} + \left(x + 2\right)} \geq 1$$
$$\sqrt{- 4 \sqrt{-2 + 5.9} + \left(2 + 5.9\right)} + \sqrt{- 6 \sqrt{-2 + 5.9} + \left(5.9 + 7\right)} \geq 1$$
1.05031646837369 >= 1

significa que una de las soluciones de nuestra ecuación será con:
$$x \leq 6$$
 _____           _____           _____           _____           _____           _____           _____          
      \         /     \         /     \         /     \         /     \         /     \         /
-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------
       x6      x10      x4      x3      x2      x11      x1      x12      x5      x9      x8      x7

Recibiremos otras soluciones de la desigualdad pasando al polo siguiente etc.
etc.
Respuesta:
$$x \leq 6$$
$$x \geq 6.54278373449149 \wedge x \leq 7.34554899576359$$
$$x \geq 8.09757208771761 \wedge x \leq 8.25$$
$$x \geq 8.79179606750063 \wedge x \leq 9.41935871894229$$
$$x \geq 9.96887112585073 \wedge x \leq 10.2068191433355$$
$$x \geq 10.4252769214024 \wedge x \leq 10.7679491924311$$
$$x \geq 10.9672909709961$$
Solución de la desigualdad en el gráfico