1/2+1/12+1/30+...+1/9120+1/9506+1/9900. / 50-50/51-51/52-...-97/98-98/99-99/100

Tính: \(B=\frac{100^2+1^2}{100\cdot1}+\frac{99^2+2^2}{99\cdot2}+\frac{98^2+3^2}{98\cdot3}+...+\frac{52^2+49^2}{52\cdot49}+\frac{51^2+50^2}{51\cdot50}\)

cho s = 1/50 + 1/51 + 1/52 + 1/53 + .......... + 1/99 + 1/100 . hãy so sánh s với 5/6 cứu mình với

A=1/1.2+1/3.4+1/5.6+....+1/97.98+1/99.100 B=1/50+1/51+1/52+....+1/99+1/100 Tính A-B

(100+99+.....+52+51) - (50+49+.....+2+1)

ai nhanh mik sẽ tích đúng nha

Cho A=1/1*2+1/3*4+...+1/99*100 và B=1/50+1/51+1/52+...+1/100 .  Tính: A-B=?

\(50-\frac{50}{51}-\frac{51}{52}-\frac{52}{53}-\frac{53}{54}-.................-\frac{99}{100}\)

C=1/1*2+1/3*4+....+1/99*100

D=1/51*100+1/52*99+.....+1/100*51

chung minh c:d ko co gia tri la so tu nhien

Tính
A=1+3^1-3^2+3^3-3^4+...........+3^99-3^100
B=50.(51^99+51^98+51^97+......+51^1+1)+1