\({x \over2}= {-1 \over y}\)
Giúp mk nhé nhanh đi
Những câu hỏi liên quan
Cho x > 0, y > 0 và \({x\over2} + {8\over y} \leq 2\). Tìm GTNN của biểu thức \(K = {x\over y} + {2y \over x}\)
Tính \(B= 1:{ {1\over 2} + {1\over3} +...+ {1\over2012} \over { 2011\over1} + {2010\over2}+...+{1\over2011}}\)
1/x+1/y = 1/24
Giúp mk nhanh nhé
Xem thêm câu trả lời
29 tháng 6 2023 lúc 16:23
1. My father still hasn’t really recovered from the death of my mother. A. went over B. got over C. took over D. looked over2. I can’t _____ walking. Can we stop and have a short rest? A. go on B. get on C. go up D. get up3. When you are finished using the computer, can you please _____ it...
Đọc tiếp
1. My father still hasn’t really recovered from the death of my mother.
A. went over B. got over C. took over D. looked over
2. I can’t _____ walking. Can we stop and have a short rest?
A. go on B. get on C. go up D. get up
3. When you are finished using the computer, can you please _____ it off.
A. take B. turn C. do D. go
4. When the alarm went off, everyone proceeded calmly to the emergency exits.
A. fell B. exploded C. called D. rang
5. Mrs. Jones's husband passed away fast Friday. We’re all shocked by the news.
A. got married B. divorced C. died D. were on business
6. If you want to be healthy. you should ________ your bad habits in your lifestyles.
A. give up B. call off C. break down D. get over
7. Try to study harder to catch ________ your classmates.
A. up B. up with C. out D. with
8. Don’t be impatient ! I ‘m sure he will turn ________ on time
A. up B. round C. on D. off
9. Go _______ this book because it has the information you need.
A. over B. by C. off D. on
10. My husband spends far more time helping our three kids ___ homework and studying for tests than I do.
A. on B. to C. with D. in
1. My father still hasn’t really recovered from the death of my mother.
A. went over B. got over C. took over D. looked over
2. I can’t _____ walking. Can we stop and have a short rest?
A. go on B. get on C. go up D. get up
3. When you are finished using the computer, can you please _____ it off.
A. take B. turn C. do D. go
4. When the alarm went off, everyone proceeded calmly to the emergency exits.
A. fell B. exploded C. called D. rang
5. Mrs. Jones's husband passed away fast Friday. We’re all shocked by the news.
A. got married B. divorced C. died D. were on business
6. If you want to be healthy. you should ________ your bad habits in your lifestyles.
A. give up B. call off C. break down D. get over
7. Try to study harder to catch ________ your classmates.
A. up B. up with C. out D. with
8. Don’t be impatient ! I ‘m sure he will turn ________ on time
A. up B. round C. on D. off
9. Go _______ this book because it has the information you need.
A. over B. by C. off D. on
10. My husband spends far more time helping our three kids ___ homework and studying for tests than I do.
A. on B. to C. with D. in
Đúng 3
Bình luận (0)
1. My father still hasn’t really recovered from the death of my mother.
A. went over B. got over C. took over D. looked over
2. I can’t _____ walking. Can we stop and have a short rest?
A. go on B. get on C. go up D. get up
3. When you are finished using the computer, can you please _____ it off.
A. take B. turn C. do D. go
4. When the alarm went off, everyone proceeded calmly to the emergency exits.
A. fell B. exploded C. called D. rang
5. Mrs. Jones's husband passed away fast Friday. We’re all shocked by the news.
A. got married B. divorced C. died D. were on business
6. If you want to be healthy. you should ________ your bad habits in your lifestyles.
A. give up B. call off C. break down D. get over
7. Try to study harder to catch ________ your classmates.
A. up B. up with C. out D. with
8. Don’t be impatient ! I ‘m sure he will turn ________ on time
A. up B. round C. on D. off
9. Go _______ this book because it has the information you need.
A. over B. by C. off D. on
10. My husband spends far more time helping our three kids ___ homework and studying for tests than I do.
A. on B. to C. with D. in
Đúng 1
Bình luận (0)
lm giúp mk 2 bài này nha
1. Cho C = \(\frac{6n-1}{3n+2}\)
Tìm n thuộc Z để C có giá trị nhỏ nhất
2. Tìm các cặp nguyên x,y
a) \(\frac{x}{7}+\frac{1}{14}=\frac{-1}{y}\)
b) \(\frac{x}{9}+\frac{-1}{6}=\frac{-1}{y}\)
Các bn giải giúp mk đi nhanh nhé ai giải giúp mk sẽ k cho
Hình như phần 1 đề sai.Nếu C nhỏ nhất thì n không có giá trị thuộc Z.Nếu C lớn nhất thì n=(-1)
2.a.x/7+1/14=(-1)/y
<=>2x/14+1/14=(-1)/y
<=>2x+1/14=(-1)/y
=>(2x+1).y=14.(-1)
<=>(2x+1).y=(-14)
(2x+1) và y là cặp ước của (-14).
(-14)=(-1).14=(-14).1
Ta có bảng giá trị:
| 2x+1 | -1 | 14 | 1 | -14 |
| 2x | -2 | 13 | 0 | -15 |
| x | -1 | 13/2 | 0 | -15/2 |
| y | 14 | -1 | -14 | 1 |
| Đánh giá | chọn | loại | chọn | loại |
Vậy(x,y) thuộc{(-1;14);(0;-14)}
b.x/9+-1/6=-1/y
<=>2x/9+-3/18=-1/y
<=>2x+(-3)/18=-1/y
=>[2x+(-3)].y=-1.18
<=>(2x-3).y=-18
(2x-3) và y là cặp ước của -18
-18=-1.18=-18.1
Ta có bảng giá trị:
| 2x-3 | -1 | 18 | 1 | -18 |
| 2x | 2 | 21 | 4 | -15 |
| x | 1 | 21/2 | 2 | -15/2 |
| y | 18 | -1 | -18 | 1 |
| Đánh giá | chọn | loại | chọn | loại |
Vậy(x;y) thuộc{(1;18);(4;-18)}
Đúng 0
Bình luận (0)
tìm số tự nhiên x biết rằng 21 chia x dư 1 và 37 chia x dư 2
Giúp mk nhé ! Ai xong mk tick cho
nhanh lên đi
x phần y+z+1=y phần x+z+1=z phần x+y-z=x+y+z
Mấy bạn giúp mk làm bài này với ạ.
Mik sẽ tick
Chìu mai mk phải đi học r,giúp mk vs nhé❤❤❤
Chứng minh với mọi số nguyên dương n ta có
\(x = {1\over2}.{3\over4}.{5\over6}...{2n+1\over2n+2}<{1\over sqrt {3n++4}}\)
Giúp mk vs
|x-1| × |-y+2| = 1
Nhớ là tìm x thuộc Z nhé
Nhanh lên nha mk đang gấp
Thuộc Z
/x-1/=1 và /-y+2/=1
*/x-1/=1=> x=2 hoặc x=0
*/2-y/=1=> y=1 hoặc 3
KL
(x,y)=(2,1);(2,3);(0,1); (0,3)
Đúng 0
Bình luận (0)
Xem thêm câu trả lời