`1)` Bth có nghĩa `<=>3x-2 >= 0<=>x >= 2/3`
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`2)` Bth có nghĩa `<=>-5+5/3x >= 0<=>x >= 3`
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`3)` Bth có nghĩa `<=>14-7x >= 0<=>x <= 2`
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`4)` Bth có nghĩa `<=>-5x-10 >= 0<=>x <= -2`
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`5)` Bth có nghĩa `<=>x+1 >= 0<=>x >= -1`
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`6)` Bth có nghĩa `<=>{(x+3 \ne 0),(x-1 >= 0):}<=>{(x \ne -3),(x >= 1):}<=>x >= 1`
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`7)` Bth có nghĩa `<=>9x^2-6x+1 >= 0<=>(3x-1)^2 >= 0` (LĐ `AA x`)
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`8)` Bth có nghĩa `<=>-x^2+2x-1 >= 0<=>-(x-1)^2 >= 0<=>x-1=0<=>x=1`
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`9)` Bth có nghĩa `<=>{(2x-1 >= 0),(-x >= 0):}<=>{(x >= 1/2),(x <= 0):}<=>x in \emptyset`
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`10)` Bth có nghĩa `<=>4/[2x+3] >= 0<=>2x+3 > 0<=>x > -3/2`
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`11)` Bth có nghĩa `<=>[-3]/[x+2] >= 0<=>x+2 < 0<=>x <= -2`
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`12)` Bth có nghĩa `<=>{(3/[x-5] >= 0),(1/[x-4] >= 0):}<=>{(x-5 > 0<=>x > 5),(x-4 > 0<=>x > 4):}<=>x > 5`
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`13)` Bth có nghĩa `<=>3-5x > 0<=>x < 3/5`
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`14)` Bth có nghĩa `<=>9-12x+4x^2 > 0<=>(3-2x)^2 > 0<=>3-2x \ne 0<=>x \ne 3/2`
