Giúp em với ạ, hứa vote ctlhn Question Giúp em với ạ, hứa vote ctlhn in progress 0 Môn Toán Khánh Gia 4 years 2020-11-04T13:09:19+00:00 2020-11-04T13:09:19+00:00 2 Answers 76 views 0
Answers ( )
`a)`
`<=>`
`=> D = (1; +∞)`
`b)`
`<=>`
`=> D = [0; 4)`
`c)`
`sqrt{x – 1} – sqrt{3} ne 0`
`<=> x – 1 ne 3`
`<=> x ne 4`
`=> D = [1; +∞)` \`{4}`
`d)`
`<=>`
`<=> D = (1; 2)` \ `{9/5}`
`e)`
`3 – x > 0`
`<=> x < 3`
`=> D = (3; +∞)`
`f)`
`<=>`
`=> D = (-1; 5]`