Question

h = 1/3 + 1/9 + 1/27 + 1/81 + ... + 1/2187 ai giúp mình với 

 

 

Answer 1

9.999999998 đoán vậy

Answer 2

1066/2187

Answer 3

Ta có \(H=\frac{1}{3}+\frac{1}{9}+\frac{1}{27}+\frac{1}{81}+....+\frac{1}{2187}\)

Suy ra \(3H=1+\frac{1}{3}+\frac{1}{9}+\frac{1}{27}+....+\frac{1}{729}\)

Nên \(3H-H=1-\frac{1}{2187}\)hay \(2H=1-\frac{1}{2187}\)

Do đó \(H=\frac{1}{2}-\frac{1}{4374}=\frac{1093}{2187}\)

Vậy \(H=\frac{1093}{2187}\)

Answer 4

các ban lam sai het roi

Answer 5

thế theo bạn là gì?

Answer 6

0

 

Answer 7

Đúng rồi ba

 

Answer 8

h=1/3+1/9+1/27+1/87+....+1/2187

3h=1-1/3+1/9+1/27+1/87+...+1/729

3h-h=(1-1/3+1/9+1/27+1/87+...+1/729)-(1/3+1/9+1/27+1/87+...+1/2187)

3h-h=1-1/2187

2h=2186/2187

h=2186/2187:2

h=2187/2186

nếu bạn thấy đúng thì tick cho mik một phát nhé

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