ai gt cho mình chỗ câu a với mình ko hỉu

Rút gọn A = ($\frac{5+3√x}{x-√x-2}$ + $\frac{4+2√x }{4-x}$ ) x $\frac{x+√x}{√x}$

ý nghĩa của pp học tập đúng đắn ngay từ khi còn là học sinh đối với tương lai

hộ trợ mk với nha mọi người . cảm ơn ạ

giúp mk nha mọi người. mk cảm ơn nhìu ạ

cách làm dạng bài phương trình vô tỉ ;-;

Dear Helgar, I would like to welcome you to our school. I know that being an (24)_________ student can be difficult, especially when you are so far away from your home. As you may have heard, the Thanksgiving holiday is (25)_________ I am aware that it isn't celebrated in Germany, but it's a very important holiday in the United States. It is an occasion when American families gather to spend time with one another and enjoy a variety of food. If you have nothinf planned for that day, I would like to (26)_________ you to visit my home for Thanksgiving. My entire famlily is planning to be there, so you will get to hang out with us. My mother is considered (27)_________ cooks in the city, so you will get a great introduction to traditional Americian home cooking. I hope you can come as I am positive that you (28)_________ a wonderful time. Let me know if you are interested. Sincerely, Greg Foster 24. A. exchange ​​B. exchanges ​​C. exchanged ​​​D. exchaning 25. A. improving ​​B. happening ​​C. approaching ​​D. passing 26. A. invite ​​​B. require ​​C. let ​​​​D. insist 27. A. the better ​​B. one of the best ​C. as good as ​​​D. the best 28. A. have​ ​​B. are having ​​C. will have ​​​D. have had

giải bpt `12 + x < \sqrt{1}` ~~~~~~~~~~~~~~~~~~

các anh cj làm giúp em với ạ em đg rất cần ạ ( ko chép mạng ạ )

Câu 1: Chứng minh rằng $\ln$ $\ln (1+x)=\sum\limits_{n=1}^{\infty}(-1)^{n-1} \dfrac{x^2}{n} $ Câu 2: Chứng minh rằng `|\frac{(1-x^2)\sin a + 2x\cos a}{1+x^2}|\leq 1` Câu 3: Chứng minh rằng: $\sum\limits_{i=1}^{q}\ \sum\limits_{n=1}^k \dfrac{1}{i^2n^2} \leq 4$