\(\left(-6,17+3\frac{5}{9}-2\frac{36}{97}\right).\left(\frac{1}{3}-0,25-\frac{1}{12}\right)\)

\(=\left(-6,17+\frac{32}{9}-\frac{230}{97}\right).\left(\frac{1}{3}-\frac{1}{4}-\frac{1}{12}\right)\)

\(=\left(-6,17+\frac{32}{9}-\frac{230}{97}\right).\left(\frac{4}{12}-\frac{3}{12}-\frac{1}{12}\right)\)

\(=-4,985578465.0\)

\(=0\)

P/s: Hoq chắc :((

ch...chịu

chịu lun rùi .....................................................................................................................................................................................................

hôm đó, chú Tiến lê...khe khẽ

hôm đó là trạng ngữ

chú tiến lê là cụm danh từ

khe khẽ là cụm động từ

ta có 1/2^2<1/1.2;1/3^2<1/2.3;...;1/2002^2<2001.2002;1/2003^2<1/2002.2003

suy ra 1/1.2+1/2.3+...+1/2001.2002+1/2002.2003

= 1-2/2+1/2-1/3+...+1/2001-1/2002+1/2002-1/2003

=1-1/2003

mà 1/2^2+1/3^2+...+1/2002^2+1/2003^2<1-1/2003<1

Ta có:

1/2² = 1/1.2

1/3² < 1/2.3

1/2002² < 1/2001.2002

1/2003² < 1/2002.2003

Suy ra : 1/2² + 1/3² + 1/2002² + 1/2003² < 1/1.2 + 1/2.3 + 1/2001.2002 + 1/2002.2003

1/2² + 1/3² + 1/2002² + 1/2003² < (1 - 1/2 + 1/2 -1/3 )+(1/2001 - 1/2002 + 1/2002 -1/2003)

1/2² + 1/3² + 1/2002² + 1/2003² <  2/3 +1/2002 -1/2003<1

1/2² + 1/3² + 1/2002² + 1/2003² < 1

"đi khắp bầu trời : mẹ là tốt nhất ; ăn khắp trăm món : muối vẫn hàng đầu "

kb nhé

My name is Long and I’m a Vietnamese. I am twenty-four years old. I live in Ho Chi Minh city in the south of Vietnam.

I have a big family with six people. I have two sisters and a brother. My sisters are older and my brother is younger than me. My father is a teacher at a secondary school. He has worked for 35 years in the field and he is my biggest role model in life. My mother is a housewife. She is nice and she is really good at cooking. I love my family so much.
I’m a generous and easy-going person but when it comes to work I’m a competitive perfectionist. I’m also an optimis and outgoing person so I have many friends and other social relationships. I enjoy reading, writing and doing math. I decided to become a Civil Engineer because I have always been fascinated by bridges, buildings, and skyscrapers. A degree in Civil Engineering enables me to achieve my goals and also gives me an opportunity to make a difference in the community.

Five years from now, I want to become a project manager of a construction project. As a project manager, my primary goals are managing people, set budgets, and making decisions of all kinds. I also want to speak English fluently so I can work with people from different countries.

my name is kien 

i am 12 year old

hết

đề có thiếu ko cậu