Các câu hỏi tương tự
CMR
S= 1/2 mũ 2 +1/3 mũ 2 + 1/4 mũ 2 +...... + 1/100 mũ 2 <1
Cho `S=1/(5^2) + 2/(5^3) + 3/(5^4) + ... + 99/(5^100)` CMR `S<1/16`
S=1/5^2 - 2/5^3 + 3/5^4 -...+99/5^100-100/5^101
CMR S<1/3^6
CMR:
a)1/10^2 +1/11^2+1/12^2+...+1/100^2 >3/4
b)1/2^2+1/3^2+1/4^2+...+1/100^2<99/100
c)1/2^2+1/3^2+1/4^2+...+1/100^2<3/4
bai 1) tim x, y
x.y-x+2y=3
bai2 ) cmr
a)1/2-1/4+1/8-1/16+1/32-1/64<1/3
b) 1/3-2/3^2+3/3^3-4/3^4+....+99/3^99-100/3^100<3/16
c)1cho tổng gồm 2014 số hạng : s=1/4+2/4^2+3/4^3+.....2014/4^2014
a) tính giá trị của biểu thức D=3/1.3+3/3.5+3/5.7+...+3/49.51
b) CMR : S=1+1/2^2+1/3^2+1/4^2+...+1/100^2 <2
CMR:(1+1/2+1/3+1/4+...+1/100)=1/2=2/3+3/4+...+99/100
S=1+1/2+1/3+.....+1/2100-1
CMR: S<100
a)CMR p/s \(\frac{12n+1}{30n+2}\)là tối giản
b) CMR \(\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{100^2}< 1\)