Kết quả của phép tính sau :a)1/3+1/9+1/27+1/81+1/243+1/729+1/2187
b)1+1/3+1/9+1/27+1/81+1/243+1/729
Kết quả của phép tính sau :a)1/3+1/9+1/27+1/81+1/243+1/729+1/2187 b)1+1/3+1/9+1/27+1/81+1/243+1/729
By Raelynn
By Raelynn
Kết quả của phép tính sau :a)1/3+1/9+1/27+1/81+1/243+1/729+1/2187
b)1+1/3+1/9+1/27+1/81+1/243+1/729
a, 1/3 + 1/9 + 1/27 + 1/81 + 1/729 + 1/2187
= 729/2187 + 243/2187 + 81/2187 + 27/2187 + 9/2187 + 3/2187 + 1/2187
= 729 + 243 + 81 + 27 +9 + 3 +1 / 2187
= 1093/2187
b, 1 + 1/3 + 1/9 + 1/27 + 1/81 + 1/243 + 1/729
= 729/729 + 234/729 + 81/729 + 27/729 + 9/729 + 3/729 + 1/729
= 729 + 234 + 81 + 27 + 9 + 3 +1/ 729
= 1093/729
`a)1/3+1/9+1/27+1/81+1/243+1/729+1/2187`
= `729/2187 + 243/2187 + 81/2187+ 27/2187+ 9/2187+ 3/2187 + 1/2187`
= `\frac{729+243+81+27+9+3+1}{2187}`
`=1093/2187`
`b)1+1/3+1/9+1/27+1/81+1/243+1/729`
`= 729/729 + 243/729 + 81/729 + 27/729 + 9/729 + 3/729 + 1/729`
`=\frac{729+243+81+27+9+3+1}{729}`
`= 1093/729`