Chứng minh $\frac{1}{1+a^{2}}$ + $\frac{1}{1+b^{2}}$ $\geq$ $\frac{2}{1+ab}$ với ab $\geq$ 1 a,b ∈ R

thê manh phát trien nông nghiêp o dong bang song hong

trong các phân số dưới đây phân số nào lớn nhất a 5/ 4 B 7/5 c 11/10 d 3/2

g, $\frac{x}{x-1{}}$=$\frac{4-3x}{x(x-1)}$ h, $\frac{2x-1}{x+2}$-$\frac{x}{x-2}$=$\frac{5x-2}{4-x^2}$ k, $\frac{x+2}{x-5}$+3=$\frac{6}{2-x}$ n, 3$x$-|4$x$-3|= 2

giải thích hình này giúp mình mn ơi

giải thích hình này giúp mình với ạ

Mn cho mik hỏi ngu cái "subtitle"là j vậy

Từ cho để trả lời : accidents break vehicle across did rules it feels after ride ____________________________________________________________ 1. What ______ you do last Sunday? 2. I stayed at home and looked _________ my younger brother yesterday. 3. He lives in a small village in the mountains so he never _______ worried about traffic jams. 4. You should remember to walk_______ the streets at the zebra crossings. 5. Does your bike ever_______ down on the way to school? 6. We must alwaysobey traffic________ for oursafety. 7. How far is_______ from your house to the bus stop? 8. There did not use to be many______ on the roads in my hometown. 9. He used to_______ a tricycle when he was three years old. 10. Now there are more traffic________ than there used to be in this city

It was breakfast time When Susan rang =>It was Giải thích CT luôn nha

thê manh phát triên kinh tê xa hôi o dong bang song hong