Bài 4. Cho biểu thức A=x(1+x)-x (1-x)+x'(x² -1) . Chứng minh rằng với hai giá trị đối nhau của x thì biểu thức A có hai giá trị đối nhau. Giúp em với ạ

Các bn vẽ cho mik anime vui Nhân tiện chúc mừng sinh nhật hoidap247 zui zẽ nha

vẽ giúp tớ 3 bé mầm đậu nha tức giận hay j j đó cũng dc vẽ tay hay app đều dc nhanh nhé đẹp sẽ vote 5*

Trên thế giới có những đại dương nảo ?

viết dạng đúng của từ trong ngoawcj 1) vietnam is a .......... country ( society) 2) the taecher had great ........... in his student ( confident) 3) we have a good ......... with our neighbors( relative) 4) he looked very ......... because the mesenger cam to invite him to the laboratory ( excite) 5) faraday spent his.... the country ( child)

Thêm từ viết câu: 1.They/ go/ back/ to England/ visit/ friends/ in two months 2.At home/ farm life/ farmers/ always/ have/ difficulty/ get/ much money 3.children/ keep/ talk/ another/ when/ teacher/ come/ in

hi các pác đây là acc phụ của táu acc chính ''baongoc140208'' bị khoá r.-. chả hỉu sao lí do:" gian lận đ ".-. thui các pác vẽ cho anime vui và bùn

1 I think I ___ a new computer this year. a will need b am needing c will have needed d have needed 2 ___ see that 3D film tonight? a You will b Are you going to c Have you d Will you have 3 Here’s an email from Jim. I ___ back later. a will write b am writing c will have written d write 4 Brian’s flight will have landed ___ we get to the airport. a until b by the time c the moment d as soon as 5 The new IT magazine is out. ___ you a copy? a Am I going to buy b Shall I buy c Am I buying d Will I have bought 6 It’ll be a long time before she ___ another useless gadget. a buys b will buy c will be buying d is going to buy 7 What ___ with this old keyboard? a shall we do b will we have done c we are going to do d did we do 8 I ___ the information by 2 o’clock. a download b am downloading c downloaded d will have downloaded 9 Please call Thomas ____ you get home. a until b the moment c as soon d by the time 10 I’m going shopping. ___ some paper for the printer? a Will I be getting b Will I have got c Am I going to get d Shall I get

Chọn đáp án thích hợp 1.New machines ______ used on this farm. A. have B. are being C. being D. were being 2. I wish it _____ my birthday everyday, but it isn't. A. had been B. were C. is D. had been 3. Winners of Olympics events are ______ with medals. A. prepares B. presented C. given D. taken

Kết cấu dân số vàng của nước ta hiện nay có tốc độ như thế nào đến phát triển kinh tế-xã hội