Cho 3x-5y/3=2y-3z/4=5z-2x/5.Chứng minh:x/5=y/3=z/2

Bài 73: Tích A=2 × 2^2 × 2^3 ×..... ×3^30 tận cùng là bằng bao nhiêu chữ sô 0 ? Bài 74: Cho S=1+3^1+3^2+3^3+....+3^30 Tìm chữ số tận cùng của S,từ đó suy ra S không phải là số chính phương. (các bạn giúp mình làm nha chiều nay kiểm tra rồi mà kiểm tra gắt lăm giúp mik nha^_^)

You có nghĩa là gì I có nghĩa là gì Your có nghĩa là gì

Tìm x;y;z nếu: a)3x=4y;3z=9y và x-3y+4z=62 b)3x-2y/2=2y-7z/3=7z-3x/5 và x+y+z=15 c)2x+1/5=3y-2/7=2x+3y-1/6x

Chỉ mình quy đồng mẫu thức thành nhiều phân thức

Dung dịch A 0.01 mol HCl và 0.02 mol NaCl. Điện phân A có màng ngăn tới khi anot thoát ra 0.224l khí thì ngừng lại, trong bình còn 1l dung dịch B. Dung dịch B có pH=?

a;(44.52.60):(11.13.15) b;123.456456-456.123123 c;(98.7676-9898.76):(2001.2002.2003....2010)

Reading scientific books is one of my interests >I’ M Unless he phones her immediately ,he won’ get any information >If The garage is going to repair the car for us next week >we are going to The news was so wonderful that she decided to celebration >I was It’s very difficult to leave here after such a long time > It isn’t -Use the given word in capital letter to rewrite the sentences without changing their meaning 1.I have lots of friends and many of them are musicians .WHOM 2 Jack often goes back to the big old house the village .He was born there .WHERE 3Fred lost his temper so then I walked out of the meeting .POINT 4 I may be back late so I’ll call you.CASE 5 Isn’t that the man with the daughter who’s on television .WHOSE 6 I have lots of fiends and many of the are musicians .WHOM

I. Give the correct forms of the words 1) These local (special) ... are not very spicy 2) These shoes are smart but they are very (comfort) ... 3) The child should be punished because of his bad (behave) ... II. Supply the correct form of the words in the blankets 1) The exhibition in the museum shows the (diverse) ... of different cultural Groups. 2) Which of you (have) ... good writing?

Phân tích đa thúc sau thành nhân tử. 1.10x^2-(x^2+25)^2 2(x-y+5)^2-2(x-y+5)+1