chứng tỏ a)A<1
chứng tỏ b)a<\(\frac{5}{6}\)
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A=\(\frac{1}{101}+\frac{1}{102}+............+\frac{1}{199}+\frac{1}{200}\)
Chứng tỏ A<\(\frac{5}{6}\)
CM \(1-\frac{1}{2}+\frac{1}{3}-\frac{1}{4}+\frac{1}{5}-\frac{1}{6}+....+\frac{1}{199}-\frac{1}{200}=\frac{1}{101}+\frac{1}{102}+....+\frac{1}{200}\)
chứng minh rằng
\(A=\frac{1}{101}+\frac{1}{102}+....+\frac{1}{199}+\frac{1}{200}< 1\)1
Chứng minh:
A = \(\frac{1}{101}+\frac{1}{102}+\frac{1}{103}+.....+\frac{1}{199}+\frac{1}{200}>\frac{7}{12}\)
CMR:
a, \(100-\left(1+\frac{1}{2}+\frac{1}{3}+..+\frac{1}{100}\right)=\frac{1}{2}+\frac{2}{3}+\frac{3}{4}+..+\frac{99}{100}\)
b, \(\left(1+\frac{1}{3}+\frac{1}{5}+...+\frac{1}{199}\right)-\left(\frac{1}{2}+\frac{1}{4}+..+\frac{1}{200}\right)=\frac{1}{101}+\frac{1}{102}+...+\frac{1}{200}\)
Giải nhanh giùm mình nhé!!!!!!!!!!!!!!
Chứng minh :
\(1-\frac{1}{2}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{199}-\frac{1}{200}=\frac{1}{101}+\frac{1}{102}+...+\frac{1}{200}\)
Chứng tỏ :
\(1-\frac{1}{2}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{199}-\frac{1}{200}=\frac{1}{101}+\frac{1}{102}+...+\frac{1}{200}\)
\(CTR:1-\frac{1}{2}+\frac{1}{3}-\frac{1}{4}+.....+\frac{1}{199}-\frac{1}{200}=\frac{1}{101}+\frac{1}{102}+.....+\frac{1}{200}\)
Cho \(A=\frac{1}{101}+\frac{1}{102}+\frac{1}{103}+\frac{1}{104}+......+\frac{1}{199}+\frac{1}{200}\)
Chứng tỏ \(A