Toán Lớp 6: x.1/2=1/1.2+1/2.3+…+1/99.100
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Toán Lớp 6: x.1/2=1/1.2+1/2.3+…+1/99.100
Comments ( 2 )
x xx1/2=1-1/2+1/2-1/3+…+1/99-1/100
x xx1/2=1-1/100
x xx1/2=100/100-1/100
x xx1/2=99/100
x=99/100:1/2
x=[99xx2]/100
x=99/50
Vậy x=99/50