Bài lm của mình
a, |2x - 3|= |x+5|
TH1: 2x-3 = x+5
<=> x= 8
TH2: 2x-3= -x-5
<=> 3x= -2
<=> x= -2/3
Vậy x ∈ {8; -2/3}
b, Làm tương tự câu a,
x ∈ {1/3; 7}
c, | 4x - 5| - |2x +1| = 0
<=> | 4x - 5| = |2x +1|
TH1: 4x- 5= 2x+1
<=> 2x= 6
<=> x=3
TH2: 4x-5= -2x- 1
<=> 6x= 4
<=> x= 2/3
Vậy x ∈ {3; 2/3}
d, Làm tương tự câu c,
x ∈ {-16/3; 8/9}
giải pt: $\sqrt[3]{x-1}$+ $\sqrt[3]{x-21}$ =$\sqrt[3]{2x-3}$
giả pt: $\sqrt[3]{1-x}$+ $\sqrt[3]{1+x}$=1
giải pt: 2$\sqrt[3]{2x-1}$= $x^{3}$+1
giải pt : $\sqrt[2]{2x^2-1}$+ $\sqrt[2]{x^2-3x-2}$= $\sqrt[2]{2x^2+2x+3}$+ $\sqrt[2]{x^2-x+2}$
Mn giải giúp mình nha cảm ơn mn nhiều Mình đang cần gấp Bài 14,15 vẽ hình nha
Cho tam giác ABC có A (1;3), B (3;5), c (4;7). Gọi G là trọng tâm tam giác ABC, G’ là ảnh của điểm G qua phép tịnh tiến vecto V = (-2;l). Tính độ dài đoạn thẳng OG’.
Guvgizktskdjchxkfhxlzgkzlgzlgz....
b) It’s time : 1. You have to dress yourself now. -> It’s ……………………………………………………….. 2. I think the children should go to bed. -> It’s about …………………………………………….. 3. Hurry up or we will be late for the train. -> It’s time ………………………………………….. 4. It’s time for children to go to bed. -> It’s high time ……………………………………………….. 5. It’s twelve o’clock. Let’s go home ! -> It’s about ………………………………………………….
Exercise 3: Use reduced relative clauses in place of the relative clauses Exercise 4: Use reduced relative clauses in place of the relative clauses
1. Where did you get the information about Disneyland Resort? find - Where ___________________________________________________________________________? 2. What time did you get out of bed this morning? up - When ___________________________________________________________________________? 3. I’ll read this leafl et to see what activities are organised at this attraction. look - I’ll ______________________________________________________________________________. 4. They’re going to publish a guidebook to diff erent beauty spots in Viet Nam. out - They’re __________________________________________________________________________. 5. I’m thinking with pleasure about the weekend! forward - I’m _____________________________________________________________________________! 6. I don’t remember exactly when my parents started this workshop. - (set up) __________________________________________________________________________. 7. We have to try harder so that our handicrafts can stay equal with theirs. - (keep up with) ____________________________________________________________________. 8. What time will you begin your journey to Da Lat? - (set off ) _________________________________________________________________________? 9. We arranged to meet in front of the lantern shop at 8 o’clock, but she never arrived. - (turn up) _________________________________________________________________________. 10. The artisans in my village can earn enough money from basket weaving to live. (live on) __________________________________________________________________________.
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