Cho góc xOy = 150 độ. Trong góc xOy vẽ tia Ot sao cho : xOt = 70 độ. Trên tia Ox lấy A, vẽ tia Az sao cho : góc xAz = 70 độ. Trên Oy lấy điểm B, vẽ Bm sao cho : góc yBm = 80 độ ( Az; Bm cùng nằm trong góc xOy ). Chứng tỏ : Az // Bm
V. Join these ideas using TOO/ENOUGH + to – infinitive or TOO/ENOUGH + for + object + to – infinitive.
I’m too tired. I can’t go to the cinema this evening.……………………………………………………………………………………………………
2.The table was too heavy. I couldn’t move it.
…………………………………………………………………………………………………
3.The children aren’t tall enough. They can’t reach that shelf
…………………………………………………………………………………………………
4.They arrived too late. They didn’t see the beginning of the film.
…………………………………………………………………………………………………
5.Our old flat was much too small. We couldn’t live in it.
…………………………………………………………………………………………………
6.He spoke too quietly. The people at the back of the room couldn’t hear.
…………………………………………………………………………………………………
7.Young adults aren’t informed about politics. They shouldn’t vote.
…………………………………………………………………………………………………
8.The company felt confident about its new product. It took on over 100 new employees.
…………………………………………………………………………………………………
Tính nhanh :
1)A=\(\frac{1}{2}-\frac{1}{2^2}+\frac{1}{2^3}-...+\frac{1}{2^{99}}-\frac{1}{2^{100}}\)
2)B=\(\frac{1}{2}+\frac{1}{2^3}+\frac{1}{2^5}+...+\frac{1}{2^{99}}\)
3)C=\(\frac{1}{2}-\frac{1}{2^4}+\frac{1}{2^7}-\frac{1}{2^{10}}+...-\frac{1}{2^{58}}\)