PP Đại số:

Phân số chỉ số cam còn lại bán giá 15000đ là:

1 – 1/2 – 1/3 = 1/6

Gọi x là số kg cam còn lại để bán. Thì số cam lúc đầu mua về là x + 5

Theo bài ra ta có:

20000 x (x+5) + 600000 = x/2 x 30000 + x/3 x 25000 + x/6 x 15000

x x 35000 = 4200000

x = 4200000 : 35000

x = 120

Vậy số cam mua về là:

120 + 5 = 125 (kg)

Đáp số:  125 kg

Chứng minh :

a) G = 1/2x2 + 1/4x4 + 1/6x6 + .......... + 1/100x100 < 1/2

b) H = 1 + 1/1x2 + 1/1x2x3 + ........... + 1/1x2x3x......x2012 < 2

a thuộc {16;-16}

tìm x hả bạn ??? 2658-469=2189

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Human beings are extremely diverse in very many  ways.  People  differ  (23)___opinions,  race,  nationality, gender, age, sexuality, ethnicity, class, religion, lifestyle and so much more, yet at the very basic we are all human species. Ideally, all people feel (24)______and joy despite the differences. Today,   the changes in time and technology have made is extremely impossible for any group of people to live without interacting with others outside their group. Often people of different cultural and geographical (25)________meet in international conferences, education exchange programs, sports, etc.

Sadly, the history of mankind discriminating against each other based on cultural differences has been with us for ages. So many people have died or have been denied their rights (26) _____individual greed. Properties and economies have also been destroyed due to lack of understanding. Unfortunately, some of these occurrences are visible even today, perpetuated by people who little understand the importance of the (27)_______of our diversity.

(Source: https://www.springbreakwatches.com)

Điền vào ô 23.

A. from

B. by

C. in

D. with