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29 tháng 4 2018

=400+1

=401.

29 tháng 4 2018

40001 bạn nhé

14 tháng 1 2019

Vì A có 200 thừa số nên thừa số cuối cũng sẽ là ( 200 - 200 )

Khi đó :

A = ( 200 - 1 ) ( 200 - 2 ) ... ( 200 - 200 )

A = ( 200 - 1 ) ( 200 - 1 ) ... 0

A = 0

Vậy A = 0

A=0 nha

_______________
_____________
hok tốt

22 tháng 2 2017

1802,tk cho minh nha!

22 tháng 2 2017

200+200+200+200+200+200+200+200+200+2

=200x9+2

=1800+2

=1802

h nha may che

21 tháng 2 2017

= 1600 nha ban
 

21 tháng 2 2017

= 1600 nha kudo

28 tháng 2 2017

200+200+200+200+200+200+200+200=1600

28 tháng 2 2017

=1600

1. We/use/art/communicate/200 yearsA. We will be using art to communicate in 200 yearsB.  We will use art for communicating for 200 yearsC.  We will have used art to communicating in 200 yearsD.  We will be using art for communicating for 200 years2. I/look forward to/hear/you/soonA. I am looking forward to hearing from you soonB. I am looking forward to hear from you soonC. So am I looking forward to hear from you soonD. I look forward to hear from you soon3. The number/English...
Đọc tiếp

1. We/use/art/communicate/200 years

A. We will be using art to communicate in 200 years

B.  We will use art for communicating for 200 years

C.  We will have used art to communicating in 200 years

D.  We will be using art for communicating for 200 years

2. I/look forward to/hear/you/soon

A. I am looking forward to hearing from you soon

B. I am looking forward to hear from you soon

C. So am I looking forward to hear from you soon

D. I look forward to hear from you soon

3. The number/English speakers/increase/recent years

A. The number of English speakers increase in recent years

B. The number of English speakers have increased in recent years

C. The number of English speakers increased in recent years

D. The number of English speakers has increased in recent years

4. According/latest report/the number/people/injured/typhoon/nearly/150

A. According to the latest report, the number of people injured in the typhoon was nearly 150

B. According to the latest report, the number of people were injured in the typhoon were nearly 150

C. According to the latest report, the number of people injured in the typhoon were nearly 150

D. According to the latest report, the number of people have injured in the typhoon was nearly 150

5. Tsunamis/also/refer/the public/tidal waves

A. Tsunamis also referred to the public as tidal waves

B. Tsunamis also refer to the public as tidal waves

C. Tsunamis is also referred as the public as tidal waves

D. Tsunamis are also referred to the public as tidal waves

1
25 tháng 5 2021

1.A

2. B

3. C

4. A

5. C

7 tháng 8 2020

A = \(\frac{1}{1.2}+\frac{1}{3.4}+...+\frac{1}{199.200}=1-\frac{1}{2}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{199}-\frac{1}{200}\)

\(=1+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{199}+\frac{1}{200}-2\left(\frac{1}{2}+\frac{1}{4}+...+\frac{1}{200}\right)\)

\(=1+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{200}-\left(1+\frac{1}{2}+\frac{1}{3}+...+\frac{1}{100}\right)\)

\(=\frac{1}{101}+\frac{1}{102}+...+\frac{1}{200}\)

Lại có B = \(\frac{1}{101.200}+\frac{1}{102.199}+...+\frac{1}{200.101}\)

=> 301B = \(\frac{301}{101.200}+\frac{301}{102.199}+...+\frac{301}{200.101}\) 

=> 301B = \(\frac{1}{101}+\frac{1}{200}+\frac{1}{102}+\frac{1}{199}+...+\frac{1}{200}+\frac{1}{101}=2\left(\frac{1}{101}+\frac{1}{102}+...+\frac{1}{200}\right)\)

=> B = \(\frac{2}{301}\left(\frac{1}{101}+\frac{1}{102}+...+\frac{1}{200}\right)\)

Khi đó \(\frac{A}{B}=\frac{\left(\frac{1}{101}+\frac{1}{102}+...+\frac{1}{200}\right)}{\frac{2}{301}\left(\frac{1}{101}+\frac{1}{102}+...+\frac{1}{200}\right)}=\frac{1}{\frac{2}{301}}=\frac{301}{2}=150,5\)

4 tháng 8 2016

200+200+200+200+200=1000

4 tháng 8 2016

200+200+200+200+200=1000