1/10+1/11+……+1/99 > 1/20+1/20+…..+1/20 = 10/20 = 1/2
1/20+1/21+……+1/29 > 1/20+1/30+…..+1/30 = 10/30 = 1/3
1/30+1/31+……+1/39 > 1/40+1/40+…..+1/40 = 10/40= 1/4
=> 1/10 + 1/11 +...+ 1/39 > 1/2 + 1/3 + 1/4 = 13/12 > 1
Vậy A > 1
1/10+1/11+……+1/99 > 1/20+1/20+…..+1/20 = 10/20 = 1/2
1/20+1/21+……+1/29 > 1/20+1/30+…..+1/30 = 10/30 = 1/3
1/30+1/31+……+1/39 > 1/40+1/40+…..+1/40 = 10/40= 1/4
=> 1/10 + 1/11 +...+ 1/39 > 1/2 + 1/3 + 1/4 = 13/12 > 1
Vậy A > 1
Cho tổng A =\(\frac{1}{10}+\frac{1}{11}+\frac{1}{12}+...+\frac{1}{99}+\frac{1}{100}\)
Chứng tỏ A > 1
Cho tổng A =\(\frac{1}{10}+\frac{1}{11}+\frac{1}{12}+...+\frac{1}{99}+\frac{1}{100}\)
Chứng tỏ A > 1
cho A=\(\frac{1}{10}+\frac{1}{11}+\frac{1}{12}+...+\frac{1}{99}+\frac{1}{100}\) chứng tỏ A>1
Cho \(A=\frac{1}{10}+\frac{1}{11}+\frac{1}{12}+...+\frac{1}{99}+\frac{1}{100}\)
Chứng tỏ rằng A > 1
Chứng tỏ tổng sau lớn hơn 1
\(C=\frac{1}{10}+\frac{1}{11}+\frac{1}{12}+...+\frac{1}{99}+\frac{1}{100}\)
Cho \(A=\frac{1}{10}+\frac{1}{11}+\frac{1}{12}+....+\frac{1}{99}+\frac{1}{100}\)
Chứng tỏ A > 1
Cho tổng A = \(\frac{1}{10}\)+ \(\frac{1}{11}\)+ \(\frac{1}{12}\)+ ............ + \(\frac{1}{99}\)+ \(\frac{1}{100}\)
Chứng tỏ rằng A > 1
Cho tổng A = \(\frac{1}{10}\)+ \(\frac{1}{11}\)+ \(\frac{1}{12}\)+ ...... + \(\frac{1}{99}\)+ \(\frac{1}{100}\)
Chứng tỏ rằng A > 1.
A=\(\frac{1}{10}+\frac{1}{11}+\frac{1}{12}+....+\frac{1}{99}+\frac{1}{100}\).CHỨNG TỎ A >1
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