`5)\sqrt{3-2x} > 4` `ĐK: x <= 3/2`
`<=>3-2x > 16`
`<=>2x < -13`
`<=>x < -13/2` (t/m đk)
_______________________________________________
`6)\sqrt{1-x^2} > 2` `ĐK: x >= 1,x <= -1`
`<=>1-x^2 > 2`
`<=>x^2 < -1` (Vô lí vì `x^2 >= 0 AA x`)
Vậy bất ptr vô nghiệm
_______________________________________________
`7)\sqrt{2-x} < 3` `ĐK: x <= 2`
`<=>2-x < 9`
`<=>x > -7`
Kết hợp đk
`=>-7 < x <= 2`
_______________________________________________
`8)\sqrt{-3x} > 1` `ĐK: x <= 0`
`<=>-3x > 1`
`<=>x < -1/3` (t/m)