Given A = 1 + 2 + 2^2 + 2^3 +...+ 2^100
If 2^50 x (A + 1 ) = 2^m, Then m =...........(please solve it carefully)
K
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KC
2
D
2
23 tháng 10 2015
A = 1 + 2 + 22 + 23 + ... + 2100
2A = 2 + 22 + ... + 2101
2A - A = 2101 - 1
A = 2101 - 1
=> 250.(2101-1+1) = 2m
=> 250.2101=2m
=> 2151 = 2m
=> m = 151
4 tháng 7 2016
Mk hỉu đề bài ns dề ng mk giải = Tiếng Việt nha, mk ko giỏi Anh cho lém
A = 1 + 2 + 22 + 23 + ... + 2100
2A = 2 + 22 + 23 + 24 + ... + 2101
2A - A = (2 + 22 + 23 + 24 + ... + 2101) - (1 + 2 + 22 + 23 + ... + 2100)
A = 2101 - 1
=> A + 1 = 2101
Ta có: 250 x 2101 = 2m
=> 2151 = 2m
=> m = 151
Ủng hộ mk nha ^_-
HP
30 tháng 12 2015
2A=2+22+23+...+2101
2A+1=1+2+22+...+2101=A+2101
2A-A=2101-1
A=2101-1
nên 250*(A+1)=250*(2101-1+1)=250*2101=2151
Vậy m=151
14 tháng 1 2016
Ban dich day :
Cho A=1+2+22+23+...+2100
Neu 250. (A+1)=2m thi m=
Tra loi: m=
Tich nha!
1 tháng 12 2021
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NH
3 tháng 11 2017
Rewrite sent:
1. He no longer comes late for class
--> He used...............to come late for class.................
2. It took him an hour to solve that exercise
--> He solved ......................that exercise in an hour...................
3. Kate took 2 aspirins and then she felt a lot better
--> After taking..............................2 aspirins, she felt a lot better................................
4. We had a lot of friends when we lived in the countryside
--> We used .............................to have a lot of friends when we lived in the countryside..........................
5. "Please buy me a newpaper on the way home" her father said
--> He father reminded........................him to buy him a newspaper on the way home.........................
A = 1 + 2 + 22 + ... + 2100
2A = 2 + 22 + ... + 2101
2A - A = 2101 - 1
A = 2101 - 1
=> 250 . ( 2101 - 1 + 1 ) = 2m
=> 250.2101 = 2m
=> 2151 = m
=> m = 151
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