Cho A = 1/101+1/102+1/103+...+1/130. CMR: 1/4 <A< 91/330
Cho A= 1/101+1/102+1/103+...+1/130.CMR: 1/4<A<91/330
Cho S=1\101+1\102+...+1\130. CMR 1\4<S<91\330
S=1/101+1/102+1/103+...+1/130
CMR 1/4<S<91/330
cho S=1\101+1\102+............+1\130.chứng minh rằng 1\4<S<91\330
s= 1/101 + 1/102 +... 1/130 chứng minh rằng 1/4<s<91/330
Cho s=1/101+1/102+1/103+....+1/130 chứng minh 1/4<s<91/330
cho s biet:1/101+1/102+....+1/130. chung minh rang 1/4<s<91/330
Cho biết S = 1/101 + 1/102 + ... + 1/130 .Chứng minh rằng 1/4 < S < 91/330