Toán Lớp 6: Tính Tổng A.B.C
A=1+2+3+…+100
B=1/1.2+1/2.3+…+1/99.100
C=(1-1/2)(1-1/3)(1-1/4)…(1-1/100)
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Toán Lớp 6: Tính Tổng A.B.C
A=1+2+3+…+100
B=1/1.2+1/2.3+…+1/99.100
C=(1-1/2)(1-1/3)(1-1/4)…(1-1/100)
Comments ( 2 )
A=[(100+1).[(100-1):1+1]]/2
A=[101.[99:1+1]]/2
A=[101.[99+1]]/2
A=[101.100]/2
A=[101.50.2]/2
A=101.50
A=5050
B=1/1.2+1/2.3+…+1/99.100
B=1-1/2+1/2-1/3+…+1/99-1/100
B=1-1/100
B=100/100-1/100
B=99/100
C=(2/2-1/2)(3/3-1/3)(1-1/4)…(1-1/100)
C=1/2. 2/3. 3/4…99/100
C=1/100
=5050. 99/200
=9999/4