\(\frac{1}{3}+\frac{1}{6}+\frac{1}{12}+\frac{1}{48}+\frac{1}{96}+\frac{1}{192}\)

= \(\left(\frac{1}{3}+\frac{1}{6}\right)+\left(\frac{1}{12}+\frac{1}{24}\right)+\left(\frac{1}{48}+\frac{1}{96}\right)+\frac{1}{192}\)

=               \(\left(\frac{1}{2}+\frac{1}{8}\right)+\left(\frac{1}{32}+\frac{1}{192}\right)\)

=                              \(\frac{5}{8}+\frac{1}{192}\)

=                                    \(\frac{121}{192}\)

ko ai bết đâu

\(=\) \(1-\frac{1}{2}+\frac{1}{2}-\frac{1}{4}+....+\frac{1}{64}-\frac{1}{128}\)

\(=\) \(1-\frac{1}{128}\)\(=\frac{127}{128}\)

Đặt \(S=\frac{1}{2}+\frac{1}{4}+\frac{1}{6}+...+\frac{1}{12}\)

\(\Leftrightarrow S=\frac{1}{1.2}+\frac{1}{2.2}+\frac{1}{2.3}+...+\frac{1}{2.6}\)

\(\Leftrightarrow S=\frac{1}{1}-\frac{1}{2}+\frac{1}{2}-.....+\frac{1}{2}-\frac{1}{6}=\frac{1}{1}-\frac{1}{6}\)

\(\Leftrightarrow\frac{6}{6}-\frac{1}{6}=\frac{5}{6}\)

Ps: Dấu \(\Leftrightarrow\) là tương dương nha! mk nghĩ là lớp 5 chưa học nên cô có hỏi thì nói đó là dấu tương đương . Nếu hỏi làm sao em biết thì nói mấy anh chị dạy!

(1/2+1/128)+(1/4+1/126)+(1/6+1/124)...+1/100

1/200+1/200+1/200...+1/100

99/200+1/100

quy đồng : 99/200+2/200

101/200

2/3 + 7/1 = 2/3 + 7 = 2/3 + 21/3 = 23/3

25/48 + 11/24 = 25/48 + 22/48 = 47/48

5/7 + 3/8 = 40/56 + 21/56 = 61/56

15/24 + 12/6 = 5/8 + 2 = 5/8 + 16/8 = 21/8

5/6 + 4/3 = 5/6 + 8/6 = 13/6

3/8 + 7/12 = 9/24 + 14/24 = 23/24

= 23/3

= 47/48

=61/56

=21/8

=13/6

= 23/24

Cảm ơn mn nhìu nhaaaaaa

\(=\frac{-263}{8085}\)

BN ƠI = \(-\frac{263}{8085}\)NHA Nguyễn Hiền Anh!

\(\text{Kết quả là : }\) \(\frac{-263}{8085}\)

 My family have 4 people. There are my mother,my father,my elder sister and me.My parents are both the same age, 50 years old.My father is a teacher ,he is very kind and hard-working. My morther is a nurse, she is interesting, I think she is the most funny person in my family. My elder sister is 18 years old, she is a student and she is very pretty,she not only learns well but also plays the piano very well, I think she will become a pianist in the future. And me, I’m 16 years old and I’m a pupil, in the future i'll be a marketing staff. I love my familly very much.For me, family always is the assured a reliable support.

Hello every body ! My name is Duy . I am 14 years old . There are 5  people in my family : My father ; my mother ; my older sisters and me . My father is a doctor . He works a hospital in the city center . Every day , he go to work by bus . My mother is a teacher . She learns English at a school near my house . She walks to school every day . I have 2 elder sister . The oldest is a secretary in a company . The younger is a studente . She is learning at Hanoi university . I love my family so much . I feel very happy to be alive in this family.

                                                   My Family :

 As you know , all of us have a faimly.The family is the place we are brought up and look after everyday. Today , I would like to introduce my topic is " My Family"

 I come from a family of 4 people : my parents , my younger brother and me.

 My father is an engineer. He likes reading new spaper and watching TV.He teaches me many helpfull things in the life : know how to love everyone , how to behave well , how to keep clothes and schoolthings clean and tidy , ect .....But sometimes when I make mistakes , he is very strict but frankly my father is so kind and friendly.

 And my mother is a teacher.She is a good woman. She is very carefull.My mother cooks very well.My brother and I like eatiing her dishes very much especially fried chicken , and so on... My parents love me and my younger brother so much but they don't say.

 And my brother is a good student at Nguyen Ngoc Binh Primary School.He is a active boy in many activities as well as studying. When my brother and I have free time, we often play many many sports and games such as : badminton , volleyball , hide - and - seek , ect....

 And my name is Nhi. I'm a student at class 6/1 at Tran Phu Secondary School. I'm very good at English.

 When all the members in my family have free time , we usually talk about studying as well as working together.Also , I can have meats with my family.I'm so happy and really fun so much. At the weekend , we visit many places such as : park , zoo , beach , ....  I love all the people in my family.

 So being a member of my family , I will try my best to study well to become a good daughter . And my parents will be proud about me.

hinh nhu = 2

ai trả lời mình h cho

bạn giải thích rõ ràng ra đi mình h cho

cần giúp thì kêu giúp minigame nữa chớ chảnh ớn -_-

 MK CHỈ CÓ TÍNH CHẤT NGHIỆP DƯ NẾU K THÍCH ĐỪNG CƯỜI NHA có 2đứa bé là bn thân của nhau.trong hai đứa đó thì có một đứa chăm học còn đứa kia thì  ngược lại. sắp đến tiết kiểm tra, bn chăm học khuyên bn lười đi ôn bài nhưng bn kia k chịu mà ham chơi. tói tiết kiểm tra, bn kia k làm đc bài liền cầu cứu bạn mình nhưng bị bạn lơ đi. sau đó bn kia giân. bn chăm học cũng tỏ ra k quan tâm.về nhà bn lười học nói với mẹ chuyện này.mẹ bn đó liền trách nhẹ bn kia và giảng cho bn kia hiểu chuyện . bn kia hiểu ra và quyết tâm sáng mai xin lỗi bạn và hứa chăm chỉ

con này hỏi bài nghe

trả lời 

=600

chúc bn học tốt

nhớ k mình nha

\(1+2+4+6+...+46+48\)

\(=1+\left(2+4+6+...+46+48\right)\)

Từ 2 -> 48 có: ( 48 - 2 ) : 2 + 1 = 24 ( số hạng )

Tổng từ 2 -> 48: ( 48 + 2 ) x 24 : 2 = 600

\(=1+600=601\)

Bài giải

Số lượng chữ số của tổng trên là:

     (48-1+1):2+1=25

Ta có: 24 cặp biểu thức cộng lại với nhau và cộng thêm 1.

1+2+4+6+8+...+46+48

=(48+2)+(46+4)+(44+6)+...(24+26).

=50.24+1=1201.

Hok tốt !

Mk ko chắc nhé !, sai bỏ qua nha !