tinh S=1mu2+2mu2+.....+10mu2
S=1/2mu2 + 1/3mu2 + 1/4mu2 + ... + 1/100mu2 bé hơn 1
chung minh rang : 1 +1/2mu2 +1/3mu2 +1/4mu2 +...+1/100mu2 < 2
chung minh rang;
1/2mu2+1/3mu2+1/4mu2+...+1/2005mu2<1/2
11/2mu2+1/3mu2+1/4mu2+...+1/9mu2 cmr 2/5<s<8/9
(1-1/2mu2)(1-1/3mu2)(1-1/4mu2)......(1-1/10mu2)????
Giúp mình với
chứng tỏ rằng:1/2mu2+1/3mu2+1/4mu2+....+1/2014mu2+1/2015mu2<1
lề:mjh k pjt vjet dau fan so va dau mu nen vjet vay nhe
p/s:cac ban gjaj gjup mjh vs,aj co nhu cau ket ban vs mjh k nk
\(S=\dfrac{2mu2}{1.2}+\dfrac{2mu2}{2.3}+\dfrac{2mu2}{3.4}+...+\dfrac{2mu2}{2022.2023}\)
(mu = mũ)
