Các câu hỏi tương tự
Cho tong T=2/2^1+3/2^2+4/2^3 +...+2016/2^2015+2017/2^2016.So sanh T voi 3
Cho S= 1/5+2/52+3/53+.....+2015/52015. so sanh voi 1/3
Cho tong T=2/2^1+3/2^2+4/2^3 +...+2016/2^2015+2017/2^2016.So sanh T voi 3
ai trả lời được mình tik 3 nick luôn
A=(1+1/2015)×(1+1/2015^2)+...+(1+1/2015^2016)
So sanh voi B=2015^2-1/2014^2-1
Cho M=1+1/2+1/2^2+...+1/2^2015+1/2^2016. so sanh M voi 2
giup mik voi cac ban
1,tim 2chu so tan cung cua : S =2015 + 20152 + .............+20152015
2,so sanh 19920 va 2003 15
mik dang can gap gap lam , mik se tik cho cac ban
cho a= 2/5x7 + 2/8x10 + ... + 2/2015 x 2017 so sanh a voi 13%
Cho tong S=1+2+2^2+2^3+...+2^2015.Hoi S+18 co phai la mon so chinh phuong ko,vi sao
a. So sanh 2 phan so:A= 2015/2016+2016/2017+2017/2018 va B = 2015+2016+2017/2016+2017+2018
b.1/2.4+1/4.6+........+1/(2x-2).2x = 1/8
c.Cho A = 1/4+1/9+1/16+...+1/81+1/100 . Chung minh rang : A > 65/132
d.Cho B = 12/(2 . 4 ) ^ 2 + 20/ (4 . 6) ^2 + ...........+ 388/ ( 96 . 98 ) ^ 2 + 396/ ( 98 . 100 ) ^2 .Hay so sanh B voi 1 /4