1)cho 1/a+1/b+1/c=2 1/a ²+1/b ²+1/c ²=2 cmr:a+b+c=abc 2)cho x/a+x/b+x/c=o a/x+b/y+c/z=2 tính a ²/x ²+b ²/y ²+c ²/z ² 3)cho (a+b+c) ²=a ² +b ²+c ² và a,b,c khác 0 cmr 1/a ³+1/y ³+1/zc³=3/abc 5)xác ddimhj a,b,c sao cho 1/(x-1)(x ²-x+1) viết dưới dạng a/x-1 +bx+c/x ²-x+1

tả loài cây em yêu nka :333 nêu ích lợi và cảm nhận nx nka , nhanh xíu ạ mik đg cần gấp !

chứng minh rằng 5^n-1 chia hết cho 4

+Lập dàn bài chi tiết cho đè văn: Kể về kỉ niệm đẹp của em +Viết đề bài trên

Giúp mình với, loay hoay Hoài mà vẫn ko biết làm, a,b,c luôn ạ

tìm n biết n+6 chia hết cho n+2 2n+3 chia hết cho n+12 3n+4 chia hết cho 11-2n

hép mi!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

1)cho 1/a+1/b+1/c=2 1/a ²+1/b ²+1/c ²=2 cmr:a+b+c=abc 2)cho x/a+x/b+x/c=o a/x+b/y+c/z=2 tính a ²/x ²+b ²/y ²+c ²/z ² 3)cho (a+b+c) ²=a ² +b ²+c ² và a,b,c khác 0 cmr 1/a ³+1/y ³+1/zc³=3/abc 5)xác ddimhj a,b,c sao cho 1/(x-1)(x ²-x+1) viết dưới dạng a/x-1 +bx+c/x ²-x+1

GIÚP MÌNH ĐI 5H15 MÌNH ĐI HỌC RỒI ^^ Vẽ hình thỏa mãn điều kiện sau : ba điểm A, B, C thẳng hàng . Ba điểm B, C, D thẳng hàng. Ba điểm B, C, E ko thẳng hàng. Có mấy đường thẳng, đoạn thẳng trong hình vẽ? Kể tên các tia góc B, trong đó có những tia nào là hai tia đối nhau?

Ex 5: Gap filling: Choose the suitable words from the box to complete the sentences. emphasize originated typically idol launched eliminate post passionate ...., we can know more about her. renowned biography 64. By having a look at her 65. We need to recognize that when people adore a job, they are likely to work successful with it. 66. Nowadays, it is said that a lot of teenagers blindly or excessive adore their 67. In order to be noticed by many people, he has started to ......... his homemade videos on the internet lately. Some people say that this is not a good way to be famous. 68. In the past, it was hard for people to be noted, but today, this has changed. They can become ..about it'and they are with the aid of advertisement and promotion. 69. Few viewers have watched this program since it first interfered with a lot of advertisement. 70. To make sure that there are only competent candidates for the next round, they that can't answer correctly 5 first questions. 71. Quan Ho singing ....... in Bac Ninh Province in the 13t" century, and is sung at spring festivals. 72. A dangdut band mix of musical instruments. 73. His works often..... on the values of family life as well as the relationship among people in society. .... .in our country because it has been the ones ... consists of a male or female lead singer, who is backed by an unusual