Cho A= 11/9+18/16+27/25+...+1766/1764.
Chứng minh 40 20/43<A<40 20/21
Cho A=11/9 + 18/16 + 27/25 + ... + 1766/1764. CMR A<40 + 20/43.
\(A=\frac{11}{9}+\frac{18}{16}+\frac{27}{25}+...+\frac{1766}{1764}\)Chứng minh : \(40\frac{20}{43}
\(A=\frac{11}{9}+\frac{18}{16}+\frac{27}{25}+...+\frac{1766}{1764}\)Chứng minh rằng \(40\frac{20}{43}
Cho:
A=11/9+18/16+27/25+...+1766/1764
Chứng minh :A>40+20/43
cảm ơn nhiều!
cho A=\(\frac{11}{9}\)+\(\frac{18}{16}\)+\(\frac{27}{25}\)+...+\(\frac{1766}{1764}\).Chứng minh \(40\frac{20}{43}\)<A<\(40\frac{20}{21}\)
Cho A = \(\frac{11}{9}\)+ \(\frac{18}{16}\)+ \(\frac{27}{25}\)+ ... + \(\frac{1766}{1764}\). Chứng minh : 40\(\frac{20}{43}\)< A < 40\(\frac{20}{21}\)
Cho \(A=\frac{11}{9}+\frac{18}{16}+...+\frac{1766}{1764}\). Chứng minh: \(40\frac{20}{43}< A< 40\frac{20}{21}\)
Chứng minh rằng:
\(\frac{9}{5^2}+\frac{9}{11^2}+\frac{9}{17^2}+...+\frac{9}{305^2}< \frac{3}{4} \)
\(C=\frac{11}{9}+\frac{18}{16}+\frac{27}{25}+...+\frac{1766}{1764}\)
Chứng minh rằng:\(40\frac{20}{43}< C< 40\frac{20}{21}\)
\(D=\frac{8}{9}+\frac{24}{25}+\frac{48}{49}+...+\frac{200.202}{201^2}>99,75\)
\(E=\frac{3}{4}+\frac{8}{9}+\frac{15}{16}+...+\frac{24}{2500}>48\)
Giải nhanh trong chiều này giùm mình nhé!
