= 1-1/2.3-1/3.4-....-1/99.100
= 1-1/2+1/3-1/3+1/4-......-1/99+1/100
= 1-1/2+1/100
= 51/100
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Các câu hỏi tương tự
1/2+1/6+1/12+1/20+1/30+...+1/9900
b=1-1/6-1/12-1/20-1/30-......-1/9900
Tính B=1/2+1/6+1/12+1/20+1/30+...+1/9900
B=1/2+1/6+1/12+1/20+1/30+...+1/9900 = ?
Tính B= 1\2+1\6+1\12+1\20+1\30+...+1\9900
Tính:
1/2+1/6+1/12+1/20+1/30+...+1/9900
Tính :
B= 1/2+1/6+1/12+1/20+1/30+....+1/9900
A =1+2+3+4+5+...+99+100
B =1/2+1/6+1/12+1/20+1/30+...+1/9900
A=1+2+3+4+5+....+99+100
B=1\2+1\6+1\12+1\20+1\30+....+1\9900