1)The shirt is too small for me to wear

-The shirt is not......fit , i cann't wear it.....

-The shirt is so....small that i cann't wear it..........

-It is such.....a small shirt that i cann't wear it........

2)The exercises are so difficult that we can't do them

-The exercises was too....difficult for us to do.........

-The exercise are not.....easy enough for us to do....

-They are such...difficult exercises that we cann't do it ...

3)It was such hot water that he couldn't drink it

-The water was too hot that or he to drink

-The water was not cold enough for he to drink

-The water was too hot for he to drink

4)He is not strong enough to carry this table

=> He is too weak to carry this table

Số dân tăng thêm là:
(5000 : 1000) x 18 = 90 (người)
Sau 1 năm, số dân của xã đó là:
5000 + 90 = 5090 (người)
Đáp số: 5090 người

Ta có

\(\left(a+b+c\right)^3=a^3+b^3+c^3+3\left(a+b\right)\left(b+c\right)\left(c+a\right)\)

\(\Rightarrow a^3+b^3+c^3=\left(a+b+c\right)^3-3\left(a+b\right)\left(b+c\right)\left(c+a\right)\)

Áp dụng vào tổng ta có

\(\left(a+b-2c\right)^3+\left(b-c-2a\right)^3+\left(c+a-2b\right)^3\)

Đặt

\(M=\left(a+b-2c+b+c-2a+a+c-2b\right)^3\)

=> M=0

\(N=3\left(a+b-2c+b+c-2a\right)\left(b+c-2a+a+c-2b\right)\left(a+c-2b+a+b-2c\right)\)

\(\Rightarrow N=3\left(c-a\right)\left(a-b\right)\left(b-c\right)\)

Để ý : M+N=B

=> \(B=0+3\left(c-a\right)\left(a-b\right)\left(b-c\right)\)

=> \(B=3\left(c-a\right)\left(a-b\right)\left(b-c\right)\)

Câu 1: 9

Câu 2: 70

Câu 3: 1007

Câu 4: 9

Câu 5: 45

Câu 6: 10

Câu 7: 8

Câu 8: 36

Câu 9: 1006

Câu 10: 21

Tại x= - 3

=> \(B=\left[\left(-3\right)^{2017}+3\left(-3\right)^{2016}-1\right]^{2017}\)

=> \(B=\left[\left(-3\right)^{2017}+3^{2017}-1\right]^{2017}\)

=> \(B=\left(-1\right)^{2017}\)

=> B = - 1

Tổng vận tốc của 2 xe là:
43,5 + 28,5 = 72 (km/h)
Hai xe gặp nhau sau:
180 : 72 = 2,5 (giờ) = 2 giờ 30 phút
 

 A = 1/2.3 + 1/3.4 + 1/4.5 + 1/5.6 + 1/6.7 + 1/7.8         

    = 1/2 - 1/3 + 1/3 -1/4 + 1/4 - 1/5 + 1/5 - 1/6 +1/6 - 1/7 + 1/7 - 1/8 

    = 1/2 - 1/8           

     =  3/8        

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