Chứng minh rằng: 1+1/2+1/3+...+1/64 > 4
chứng minh rằng:
1+1/2+1/3+1/4+...+1/64 <6
Chứng minh rằng: 1/2-1/4+1/8-1/16+1/32-1/64 <1/3
chứng minh rằng 1/2-1/4+1/8-1/16+1/32-1/64<1/3
chứng minh rằng
1/2-1/4+1/8-1/16+1/32-1/64<1/3
1.Chứng minh rằng 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
Chứng minh rằng: A< 3
A= 1/2- 1/4+ 1/8- 1/16 +1/32- 1/64
Chứng minh rằng:
a) 1/2-1/4+1/8-1/16+1/32-1/64<1/3
b) 1/3-2/3^2+3/3^3-3/3^4+...+99/3^99-100/3^100<3/16
