Đáp án: $1<x<5$
Giải thích các bước giải:
`(x-2)/(x-5)-3/(x-1)<1` $Đkxđ:x\neq5,x\neq1$
`⇔(x^2-3x+2-3x+15-x^2+6x-5)/((x-5)(x-1))<0`
`⇔(12)/((x-5)(x-1))<0`
`⇔(x-5)(x-1)<0`
$TH1:\left \{ {{x-5>0} \atop {x-1<0}} \right.⇒\left \{ {{x>5} \atop {x<1}} \right.$ Không tồn tại $x$
$TH2:\left \{ {{x-5<0} \atop {x-1>0}} \right.⇒\left \{ {{x<5} \atop {x>1}} \right.⇒1<x<5$ $(tm)$
Vậy nghiệm của bất phương trình là: $1<x<5$.
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REVISION 1 Chia dạng đúng của động từ trong ngoặc ở thì hiện tại. Exercise 1: 1. My clothes are not in the room. They (just take) them away. 2. This is the most beautiful place I (ever visit) 3. We are very tired. We (walk) for three hours. 4. I (see) that film several times because I like it. 5. Up to now, the teacher (give) our class 5 tests. 6. Please be quiet! I (work) ……………… 7. Mary (come) from London. 8. Sometimes I (get) up before the sun (rise) . 9. She (ask) me to tell about him several times. 10. Mr Jackson (paint) his house since last month. 11. How long you (wait) for me? - Just a few minutes. 12. He often (say) OK when he (talk) with the guests. 13. Tom (not come) here tomorrow. 14. Listen! The bird (sing) ……………… 15. Someone (cut) down all the trees in the garden.
Chia động từ trong ngoặc ở thì hiện tại hoàn thành hoặc hiện tại hoàn thành tiếp diễn. 1. I (try) to learn English for years, but I (not succeed) yet. 2. Mary is ill because she (work) in the garden all day. 3. She (work) so hard this week that she (not have) time to go to the movies. 4. That book (lie) on the table for weeks. You (read) it yet? 5. He (not be) here since Christmas. I wonder where he (live) since then. 6. Jack (go) to Paris for a holiday. He never (be) there. 7. You (sleep) so far? I (ring) the bell for the last twenty minutes. 8. He (write) a novel for two years, but he (not finish) it yet. 9. Mary (lose) her hat and she (look) for it until now. 10. She (sleep) for 10 hours! You must wake her.
Viết 1 đoạn văn ngắn (5 - 7 ) câu về cây ăn quả
: Chia dạng đúng của động từ của thì trong ngoặc ở thì thích hợp. 1. At this time yesterday we (play) tennis in the schoolyard. 2. At 7 p.m yesterday he (watch) TV. 3. Yesterday while my father (watch) TV, my mother (read) the newspaper, my sister (do) her homework and I (play) chess with my friend. 4. What were you doing when I phoned you? I (have) a bath. 5. She (do) her homework at the time yesterday. 6. Marry (water) the flowers at 3 p.m yesterday. 7. They (visit) the zoo at ten o'clock yesterday. 8. Peter and I (do) the exercise at this time last night. 9. At 7 p.m last night my father (feed) the pigeons. 10. At this time last year we (learn) English in London.
Nếu bạn có cơ hội đi du lịch nước ngoài,thì bạn sẽ đi nước nào.Vì sao (Viết bằng Tiếng Anh nhé)
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1. Thay đổi câu sao cho nghĩa ko đổi 1.Jane doesn't like watching sport on TV. = Jane is not keen............................................ 2.how much time do you spend learning English every day? = How long does....................................................
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