Các câu hỏi tương tự
CMR: A= 1/2-2/2^2+3/2^3-4/2^4+....+99/2^99-100/2^100<2/9
CMR
1/2-2/2^2+3/2^3-4/2^4+.....+99/2^99-100/2^100<2/9
CMR: 1/2-2/2^2+3/2^3-4/2^4+.....99/2^99-100/2^100<2/9
CMR
1/2-2/2^2+3/2^3-4/2^4+.....+99/2^99-100/2^100<2/9
CMR: 1/2-1/22+3/23-4/24+......+99/299-100/2100 < 2/9
bài 1
A=1*2*3+2*3*4+3*4*5+...+99*100*101
B=1*3*5+3*5*7+...+95*97*99
C=2*4+4*6+..+98*100
D=1*2+3*4+5*6+...+99*100
E=1^2+2^2+3^2+...+100^2
G=1*3+2*4+3*5+4*6+...+99*101+100*102
H=1*2^2+2*3^2+3*4^2+...+99*100^2
I=1*2*3+3*4*5+5*6*7+7*8*9+...+98*99*100
K=1^2+3^2+5^2+...+99^2
Giúp mình với:
Cho A=1/1×2^2+1/2×3^2+1/3×4^2+...+1/99×100^2. CMR A<4/9
CMR: A=1/2 - 2/2 mũ 2 + 3/2 mũ 3 - ........+ 99/2 mũ 99- 100/2 mũ 100 < 2/9
Chứng minh rằng
A=1/2 - 2/2^2 + 3/2^3 - 4/2^4 + ...99/2^99 - 100/2^100 < 2/9