\(=1670.\frac{7}{25}.\frac{3}{4}\)

\(=350,7\)

1. This lesson (not study) hasn't been studied yet
2. When I (be) was small, I used to (cry) cry much
3. Where was your bike (repair) repaired yesterday ?
4. In spite of not helping her mom , she didn't complete her work
=> Although she didn't help her mom, she didn't complete her work.
5. When do you start your classes ?
=> When are your classes started?
6. They will rewrite this sentence
=> This sentence will be rewritten.
7. These workers sing VietNamese folks
=> VietNamese folks are sung by these workers.

BM=CM co nghia la am la duong trung tuyen cua tam giac ABC

=> 4.S = 1 + 4 2 + 4 3 + 4 4 + ... + 4 2014 => 4.S - S = 1 + 4 2 + 4 3 + 4 4 + ... + 4 2014 − 4 1 + 4 2 + 4 3 + ... + 4 2014 => 3.S = = 1 + 4 2 − 4 1 + 4 3 − 4 2 + 4 4 − 4 3 + ... + 4 2014 − 4 2013 − 4 2014 => 3.S = 1 + 4 1 + 4 1 + ... + 4 1 − 4 2014 Tính A= 1 + 4 1 + 4 1 + ... + 4 1 => 4.A = 4 + 1 + 4 1 + 4 1 + ... + 4 1 => 4.A - A = 4 − 4 1 => A= 3 4 − 3.4 1 4 1 2014 4 1 2014 4  Trả lời 3  Đánh dấu Cho tổng gồm 2014 số hạng: S= 1/4 + 2/4 2 + 3/4 3 + 4/4 4 + ... + 2014/4 2014 Chứng mih rằng: S < 1 2 3 2013 ( 2 3 2013 ) ( 2 3 2014 ) ( ) ( 2 2 ) ( 3 3 ) ( 2013 2013 ) 2014 2 2013 2014 2 2013

Ta có: | x - 3 | = 6

<=> x - 3 = 6

       x - 3 = -6

<=> x = 6 + 3

       x = -6 + 3

<=> x = 9

       x = -3 

Ngọc có tất cả số bộ quần áo là

             20+2=22( bộ)

                      Đáp số 22 bộ quần áo