Chứng minh rằng
\(\frac{2}{3^2}+\frac{3}{3^3}+\frac{4}{3^4}+...+\frac{2016}{3^{2016}}< \frac{5}{12}\)
Chứng minh rằng:
\(\frac{2}{3^3}+\frac{3}{3^3}+\frac{4}{3^4}+...+\frac{2016}{3^{2016}}< \frac{5}{12}\)
chứng minh rằng:1/2! + 2/3! + 3/4! + ..... + 2016/2017!
Cho B=1/3+1/3^2+1/3^3+1/3^4+...+1/3^2016+1/3^2017.
Chứng minh rằng B<1/2
Giúp minh nhé . Mình cảm ơn !
Chứng minh rằng 2/3^2+3/3^3+4/3^4+..................+2016/3^2016< 5/12
cho A=1/2*3/4*5/6.....*2015/2016.chứng minh rằng A2<-/2017
Cho a1/a2=a2/a3=a3/a4=......=a2015/a2016
Chứng minh rằng:a1/a2016=(a1+a2+a3+.....+a2015/a2+a3+a4+.....+a2016)2015
Chứng minh rằng : \(B=1+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+....+\frac{1}{2^{2016}-2}+\frac{1}{2^{2016}-1}>1008\)
chứng minh
1/2! +2/3! +3/4! + .... + 2016/2017! < 1