đặt \(B=\frac{2}{3}.\frac{4}{5}.\frac{6}{7}...\frac{98}{99}.\frac{100}{100}\Leftrightarrow A
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đặt \(B=\frac{2}{3}.\frac{4}{5}.\frac{6}{7}...\frac{98}{99}.\frac{100}{100}\Leftrightarrow A
cmr 1/2.3/4.5/6. ... .99/100 < 1/10
choA=1/2.3/4.5/6.../99/100. cmr: 1/15<A<1/10
cho A=1/2.3/4.5/6.../99/100
cmr: 1/15<A<1/10
cho P=1/2.3/4.5/6.....99/100 CMR 1/15<P<1/10
cho A = 1/2.3/4.5/6...99/100
cmr A<1/10
1/15<A
M=1/2.3/4.5/6.…99/100; N=2/3.4/5.5/7….100/101
CMR M < NTìm tích của M.NCMR M < 1/10A=1/2.3/4.5/6.....99/100.Chứng minh rằng 1/15<A<1/10
Cho A=1/2.3/4.5/6...99/100. Chứng minh rằng 1/15<A<1/10
Cho A= 1/2.3/4.5/6....99/100. Chứng minh rằng: 1/15 < A < 1/10