Tính

\(A=\sqrt{1+\frac{1}{2^2}+\frac{1}{3^2}}+\sqrt{1+\frac{1}{3^2}+\frac{1}{4^2}}+.......+\sqrt{1+\frac{1}{2010^2}+\frac{1}{2011^2}}\)

MN GIÚP MK NHANH VS NHA

MK ĐANG GẤP LẮM 2H CHIỀU ĐI HC MẤT R :<<<

MK TICK CHO

Cho biểu thức P=\(\left(\frac{\sqrt{a}}{2}-\frac{1}{2\sqrt{a}}\right)\left(\frac{a-\sqrt{a}}{\sqrt{a}+1}-\frac{a+\sqrt{a}}{\sqrt{a}-1}\right)\)

a,Rút gọn biểu thức P

b,Tìm a để P=-a

c,Tìm a để P lớn hơn -2

Chuyển câu từ TT sang GT

1,"Should I phone him now?"The girl wondered

2."Should I agree to have a date with him?"the joung girl wondered

3,"How much money should we invest into this conical hat making company?" a businessman asked his friends

4,''How can we go to Bat Trang?" the students asked their teacher

5," should we take a taxi or walk to the museum?" they wondered

MN ơi giúp mk nhanh vs nhá mai mk đi hc r . Mk sẽ tick cho tất cả những bn tl :)))

Tìm GTNN của biểu thức

a,\(x+y-8\sqrt{x}-2\sqrt{y}-2019\)

b,\(x+y+12\sqrt{y}-4\sqrt{y}+19\)

c,\(2x+y-10\sqrt{x}-6\sqrt{y}+2\sqrt{xy}+8\)

d,\(2y+x-2\sqrt{x}-2\sqrt{y}+2\sqrt{xy}+2\)

m giúp mk nha mk sắp đi hc r mk tick cho please :3

Fill in the blank with the correct relative pronoun.

1. There are eighteen different kinds of penguins ______ live south of the equator.

2. Thank you very much for the present ______ you sent me.

3. This is Mrs. Jones, ______ son won the championship last year.

4. His girlfriend, ______ he trusted absolutely, turned out to be an enemy spy.

5. The bus crashed into a queue of people, four of _______ were killed.

6. A man bought in a little girl, ______ hand was cut by flying glass.

7. Mary, ______ boyfriend didn't turn up, ended by having lunch with Peter.

8. He paid me $5 for cleaning ten windows, most of _______ hadn't been cleaned for at least a year.

9. In prison they fed us on dry bread, most of ______ was moldy. 10. The chair in _____ I was sitting suddenly collapsed.

11. The bed ______ I slept on has no mattress.

12. The man _______ I was waiting for didn't turn up.

13. The student with ________ she was dancing had a slight limb.

Bt về MĐQH nha mn giúp mk lm trước 7h sáng mai vì lúc đó mk phải đi hc r

giúp mk vs m tick cho :))))

Giải phương trình

a,\(\sqrt{x-2+-\sqrt{2x-5}}+\sqrt{x+2+3\sqrt{2x+5}}=7\sqrt{2}\)

b,\(\sqrt{x+2-4\sqrt{x-2}}+\sqrt{x+7-6\sqrt{x}-2}=1\)

Rút gọn

a,\(E=\sqrt{\left(3x+1\right)^2}+3\sqrt{\left(1-x\right)^2}\) với x<1

b,\(F=\sqrt{\left(2x+4\right)^2}+2\sqrt{\left(3-x\right)^2}\)