Page 46 - Toán 9 - GV Đỗ Đạt
P. 46

x  1
                        Cho biểu thức : P       .
                                             x   2               ………………………………………………………

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                ĐKXĐ   0x    . Tìm  x  để  P  P   0.
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                ....................................................................................   x
                                                                         Cho biểu thức  A 
                ....................................................................................   x  3
                ....................................................................................   ĐKXĐ   0x  . Tìm  x  để 6x  18  P  
                                                                                                         9
                                                                                                      x
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                                            3 x
                        Cho biểu thức :  A 
                                             x   3               ………………………………………………………

                ĐKXĐ   0,x     9  .Tìm  x  để  A 2   5A        ………………………………………………………
                        x
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                ....................................................................................   2
                ....................................................................................     Cho biểu thức :  P   x   Đkxđ :
                                                                                                 x
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                ....................................................................................   x   0
                ....................................................................................   Tìm  x  sao cho (1  x ).P  10
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                                           ( x   1) 2            ………………………………………………………
                        Cho biểu thức :  P         Tìm  x   thỏa
                                               x                  ………………………………………………………
                mãn:  P x  6 x      x  4  với  x             ………………………………………………………
                                                    0
                                  3
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