\(S=3+\frac{3}{2}+\frac{3}{2^2}+....+\frac{3}{2^9}\)
\(2S=6+3+\frac{3}{2}+....+\frac{3}{2^8}\)
=>\(2S-S=\left(6+3+\frac{3}{2}+...+\frac{3}{2^8}\right)-\left(3+\frac{3}{2}+\frac{3}{2^2}+....+\frac{3}{2^9}\right)\)
=>\(S=6-\frac{3}{2^9}=\frac{3069}{512}\)
Tính S:
S = 3 + 3/2 + 3/2^2 + 3/2^3 + ... + 3/2^9
Tinh gia tri cua S:
S=3+3/2+3/2^2+.....+3/2^9
Tính tổng S :
S=3/2+3/2^2+...+3/2^9
tinh tong S= 3/2 +3/2^2 +3/2^3+......+3/2^9
S= 3 + 3/2 + 3/2^2 + 3/2^3 + ... + 3/2^9
TÍNH NHANH
1) S= 1/1*2+1/2*3+1/3*4+...+1/99*100
2) S= 3/1*3+3/3*5+2/5*7+...+2/97*99
3) S= 4/5*7+4/7*9+4/9*11+...+4/59*61
tính S=3+3/2+3/2^2+...+3/2^9
tính tổng:
S=3+3/2+3/2^2+3/2^3+.....+3/2^9
Tính tổng ; S=3+ 3/2+3/2^2+...+3/2^9
