A= 1/100-1/100.99-1/99.98-1/98.97-...-1/3.2-1/2.1
A=1/100-(1/100.99+1/99.98+1/98.97+...+1/3.2+1/2.1)
A=1/100-(1/100-1/99+1/99-1/98+1/98-1/97+....+1/3-1/2+1/2-1)
A=1/100-(1/100-1)
A=1/100-1/100+1
A=1
Vậy A=1
A= 1/100-1/100.99-1/99.98-1/98.97-...-1/3.2-1/2.1
A=1/100-(1/100.99+1/99.98+1/98.97+...+1/3.2+1/2.1)
A=1/100-(1/100-1/99+1/99-1/98+1/98-1/97+....+1/3-1/2+1/2-1)
A=1/100-(1/100-1)
A=1/100-1/100+1
A=1
Vậy A=1
Tính nhanh
C = 1/100 - 1/100.99 - 1/99.98 - 1/98.97 - .....- 1/3.2 - 1/2.1
Tính nhanh :
C = 1/100 - 1/100.99 -1/99.98 - 1/98.97 - ... - 1/3.2 - 1/2.1
Tính nhanh :
C = 1/100 - 1/100.99 -1/99.98 - 1/98.97 - ... - 1/3.2 - 1/2.1
tính nhanh
C = 1/100 - 1/100.99 - 1/99.98 - 1/98.97 -...............................-1/3.2 - 1/2.1
Tính nhanh :
C = 1/100 - 1/100.99 -1/99.98 - 1/98.97 - ... - 1/3.2 - 1/2.1
Tính nhanh:
C = 1/100 - 1/100.99 - 1/99.98 - 1/98.97 - ... - 1/3.2 - 1/2.1
Tính C=1/100-1/100.99-1/99.98-1/98.97-......-1/3.2-2/2.1
1/100-1/100.99-1/99.98-1/98.97- .... -1/3.2-1/2.1 =?
cho C = 1/100 -1/(100.99) -1/(99.98)- 1/(98.97)-...........- 1/(3.2)- 1/(2.1)