31. The people ________ courage you praised are now citizens. A. whose B. which C. whom D. that 32. You folks ________ live in farmhouses do not like the life of the city. A. whose B. who C. they D. which 33. Those towns ________ you were looking at in Gaul are small. A. who B. where C. which D. whom 34. In Helvetia I have seen a large city ________ many people live. A. at which B. which C. on which D. in which 35. He ________ is not my friend is my enemy. A. who B. which C. whom D. A&B 36. I sent my friend the books ________ I had written. A. who B. which C. whom D. what 37. Behind the farmhouse there was a large garden, ______ the farmer and his sons were working. A. for which B. which C. in which D. that 38. Did you see the men to whom I gave the money? A. to whom B. which C. from whom D. to that 39. She sends me the book________ she________ two years ago. A. whom / writes B. whose /wrote C. which/ writes D. which / wrote 40. The man ________ spoke to John is my brother. A. whom B. who C. whose D. which

Trong mặt phẳng tọa độ Oxy, cho đường thẳng $(d): y = mx + m + 1$ (với m là tham số) và parabol $(P): y = x^2$. Tìm $m$ để đường thẳng $(d)$ cắt parabol $(P)$ tại hai điểm phân biệt có hoành độ $x_1;x_2$ sao cho $x_1 + x_2 + x_1x_2 = \sqrt{x_2} - \sqrt[3]{7 - x_1}$

Giải giúp mình ạ, đúng mình cho 5* và hay nhất nhé

1.Xác định phương trình của đường thẳng (d) cắt trục tung tại điểm có tung độ bằng 3 và cắt trục hoành tại điểm có hoành độ bằng -1 2. Giải hệ phương trình 2(x+1)+3(x+2y)=7 3(x+1)-(x+3y)=5

Tìm các số nguyên tố x, y sao cho: x² + 45 = y² ....................

var S: integer; i: byte; a: array[1..20] of integer; begin clrscr; S:=0; write(‘Nhap vao phan tu thu i: ‘); readln(a[i]); for i:=1 to 20 do begin if (a[i] mod 5 = 0) and (i >0) then S:=S+a[i]; write(‘Tong la: ‘,S:3); end; readln; end. _________________________________________________ Chỉ ra và sửa lỗi sai.

Mọi Người Giúp Em Với, Không Cần Thiết Phải Làm Hết Đâu Còn Làm Hết Thì Tốt Quá Ạ. Em Cảm Ơn Nhiều <3

21. I see some girls ________ are pretty. A. whom B. which C. who D. they 22. Give back the money ________ you took. A. it B. who C. whom D. which 23. He was killed by a man ________ friends we know. A. whose B. which C. whom D. that 24. He spoke to the messengers with ________ you were leaving. A. which B. whom C. whose D. that 25. We captured a town ________ is in Spain. A. whom B. where C. which D. it 26. The farmers ________ we saw were in the field. A. whose B. which C. they D. whom 27. The women ________ I gave the money were glad. A. to whom B. to that C. for whom D. for that 28. I know a boy ________ name is John. A. who B. whose C. whom D. that 29. The man ________ you sent to the general has reported the victory. A. whose B. which C. whom D. he 30. I saw those slaves ________ had been led to the city. A. whose B. which C. whom D. who

2. Tìm tất cả các số tự nhiên , n để phân số 18n+ 3/21n + 7 có thể rút gọn được ,,,,,,,,,,,,,,,,,,,,,,,

cho a-b+c=2 a^2+b^2+c^2=4 x/a=-y/b=z/c CMR xy+yz+zx=0