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а)
![left { {{2x-3 textgreater 0} atop {7x+4 textgreater 0}} right. left { {{2x-3 textgreater 0} atop {7x+4 textgreater 0}} right.](https://tex.z-dn.net/?f=+left+%7B+%7B%7B2x-3+textgreater++0%7D+atop+%7B7x%2B4+textgreater++0%7D%7D+right.+)
![left { {{2x textgreater 3} atop {7x textgreater -4}} right. left { {{2x textgreater 3} atop {7x textgreater -4}} right.](https://tex.z-dn.net/?f=+left+%7B+%7B%7B2x+textgreater++3%7D+atop+%7B7x+textgreater++-4%7D%7D+right.+)
![left { {{x textgreater 1,5} atop {x textgreater - frac{4}{7} }} right. left { {{x textgreater 1,5} atop {x textgreater - frac{4}{7} }} right.](https://tex.z-dn.net/?f=+left+%7B+%7B%7Bx+textgreater++1%2C5%7D+atop+%7Bx+textgreater++-+frac%7B4%7D%7B7%7D+%7D%7D+right.+)
------------(-4/7)---------(1,5)--------------
///////////////////xxxxxxxxx
Ответ:
∞ ![) )](https://tex.z-dn.net/?f=%29)
б)
![left { {{3-2x textless 1} atop {1,6+x textless 2,9}} right. left { {{3-2x textless 1} atop {1,6+x textless 2,9}} right.](https://tex.z-dn.net/?f=+left+%7B+%7B%7B3-2x+textless++1%7D+atop+%7B1%2C6%2Bx+textless++2%2C9%7D%7D+right.+)
![left { {{-2x textless 1-3} atop {x textless 2,9-1,6}} right. left { {{-2x textless 1-3} atop {x textless 2,9-1,6}} right.](https://tex.z-dn.net/?f=+left+%7B+%7B%7B-2x+textless++1-3%7D+atop+%7Bx+textless++2%2C9-1%2C6%7D%7D+right.+)
![left { {{-2x textless -2} atop {x textless 1,3}} right. left { {{-2x textless -2} atop {x textless 1,3}} right.](https://tex.z-dn.net/?f=+left+%7B+%7B%7B-2x+textless++-2%7D+atop+%7Bx+textless++1%2C3%7D%7D+right.+)
![left { {{x textgreater 1} atop {x textless 1,3}} right. left { {{x textgreater 1} atop {x textless 1,3}} right.](https://tex.z-dn.net/?f=+left+%7B+%7B%7Bx+textgreater++1%7D+atop+%7Bx+textless++1%2C3%7D%7D+right.+)
-------(1)------(1,3)-----------
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Ответ:
------------(-4/7)---------(1,5)--------------
///////////////////xxxxxxxxx
Ответ:
б)
-------(1)------(1,3)-----------
xxxxxxx
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