1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+...+100

Mn có thế giải giúp mình 2 câu này đcko ạ

Cho hbh ABCD có góc A = 120 độ , pg góc D đi qua TĐ của cạnh AB . Gọi E là trung điểm của CD . Cm : a, AB =2AD b, Tg ADE đều , tg AEC cân c, AC vuông góc vs AD

năm nay em kém chị 8 tuổi và tuổi em bằng 3/4 tuổi chị hỏi năm nay chị bao nhiêu tuổi

bài 10 tính nhanh A=3/4+2/7+1/4+3/5+5/7 B=2/17+15/23+15/17+4/19+8/23 C= 3/7+15/3 +4/7 D=5/21+2/21+8/24

19. People speak English all over the world _____________________________________________________________________________ 20. Thomas Edison invented the phonograph in 1877 _____________________________________________________________________________ 21.Children don’t clean their bedrooms every day _____________________________________________________________________________ 22. Mary eats a loaf of bread every morning _____________________________________________________________________________ 23. A short circuit could cause the fire. _____________________________________________________________________________ 24. I could send this mail to her on time. _____________________________________________________________________________ 25. Should they announce that news as soon as possible? _____________________________________________________________________________ 26. Phuong has to return the scientific books to the library _____________________________________________________________________________ 27. Will the government rebuild the memorial monument? _____________________________________________________________________________ 28. The teacher won’t accept paper written in pencils. _____________________________________________________________________________ 29. The principle might interview her. _____________________________________________________________________________ 30. What computer can I use to type this letter? _____________________________________________________________________________

(Chỉ có 1 câu thôi ạ) Write the verb brackets in the correct form, present perfect simple or present perfect continuous. Use contractions where possible. 1. I’m afraid .....(we/get) any milk .....(we/expect) a delivery for the past four hours but .....(they/show up) yet. Help!

(X+2y)^3 (X-2y)^3 (X+y/2)^2 X^3-6x+27x-27 27+27x+6x^2+x^3

1 + tanx = 2 √2 sin (x + $\frac{\pi}{4}$ ) tìm nghiệm x ∈ ( 0 2$\pi$ )

mn vẽ giùm mình Acreus trong pokemon vs