So sanh :
A = 1/2 + 1/4+ 1/8 + 1/16 + 1/32 voi 2005/2006
So sanh 1/4+1/9+1/16+1/25+1/36+...+1/10000 voi 1 va neu cach giai(so sanh) nua nhe!
cho A=1/4+1/9+1/16+1/25+...+1/10000 so sanh A voi 3/4
So sanh A voi 1
A= 1/4 + 1/9 + 1/16 +.........+1/2500
so sanh 1/15+1/16+1/17+1/18+......+1/30 voi 1/2
So sanh A voi 1:
A=1/2*2 + 1/3*3 + 1/4*4 + .....+1/2011*2011
So sanh B voi 3/4:
B=1/2*2 + 1/3*3 +1/4*4 + ......+1/2011*2011
1/2+1/4+1/8+1/16+...+1/256+1/512
1/2 + 1/4 + 1/8 + 1/16 +...+ 1/256 + 1/512
1/2+1/4+1/8+1/16+........+1/256+1/512
