lấy MS chung là 2187, ta có:
729 + 243 + 81 + 9 + 3 + 1
________________________ = 1066/2187
2187
1066/2187.
tính nhanh 1+3+9+27+81+243+729+2187+6561+19683+59049
1+1/3+1/27+1/81+1/243+1/729+1/2187 = ?
A.1093/2187 B.1/729 C.1093/729 D.2186/729
Tính nhanh \(\frac{1}{1}+\frac{1}{3}+\frac{1}{9}+\frac{1}{27}+\frac{1}{81}+\frac{1}{243}+\frac{1}{729}+\frac{1}{2187}\)
1/3 + 1/9 + 1/27 + 1/81 +...+1/729 + 1/2187
1/3+1/9+1/27+1/81+1/243+1/729
tính nhanh
A=1/2 +1/4+1/8+1/16+1/32+1/64+1/128+1/256+1/512+1/1024+1/2048
B=1/3+1/9+1/27+1/81+1/243+1/729+1/2187
dấu / ngăn cách giữa tử số và mẫu số các ban nhé
1/3 + 1/9 + 1/27+1/81 + 1/243+ 1/729.
1/3+1/9+1/27+1/81+1/243+1/729 =?
1/3+1/9+1/27+1/81+1/243+1/729
