S = \(\frac{1}{2}+\frac{1}{2^2}+\frac{1}{2^3}+.....+\frac{1}{2^{20}}\)
2S = \(1+\frac{1}{2}+\frac{1}{2^2}+.....+\frac{1}{2^{19}}\)
=> 2S - S = \(1-\frac{1}{2^{19}}\)
=> S = \(1-\frac{1}{2^{19}}
S = \(\frac{1}{2}+\frac{1}{2^2}+\frac{1}{2^3}+.....+\frac{1}{2^{20}}\)
2S = \(1+\frac{1}{2}+\frac{1}{2^2}+.....+\frac{1}{2^{19}}\)
=> 2S - S = \(1-\frac{1}{2^{19}}\)
=> S = \(1-\frac{1}{2^{19}}
Chứng minh rằng:
S=1/2+1/2^2+1/2^3+...+1/2^20<1
chứng minh rằng : S=1/2+1/22 +1/ 23 +...1/220 <1
chứng minh rằng: S= 1/2+1/2^2+1/2^3+...+1/2^20
Giúp mik vs nha
Chứng minh rằng \(S=\frac{1}{2}+\frac{1}{2^2}+\frac{1}{2^3}+...+\frac{1}{2^{20}}< 1\)
Chứng minh rằng:
\(S=\frac{1}{2}+\frac{1}{2^2}+\frac{1}{2^3}+...+\frac{1}{2^{20}}<2\)
Chứng minh rằng :
S = \(\frac{1}{2}+\frac{1}{2^2}+\frac{1}{2^3}+....+\frac{1}{2^{20}}<1\)
Chứng minh rằng S = \(\frac{1}{2}+\frac{1}{2^2}+\frac{1}{2^3}+...+\frac{1}{2^{20}}\) nhỏ hơn 1
Cho S=1/2+1/3+1/4+...+1/31+1/32 a) chứng minh rằng S>5/2 b) chứng minh rằng S<9/2
chứng minh rằng S=1/5+1/13+1/25+....+1/19^20^2 nhỏ hơn 17/20